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11231430 = 235779677
BaseRepresentation
bin101010110110…
…000011000110
3210010121121220
4222312003012
510333401210
61040421210
7164315460
oct52660306
923117556
1011231430
116381381
123917806
132433222
1416c5130
15ebcc70
hexab60c6

11231430 has 64 divisors (see below), whose sum is σ = 31242240. Its totient is φ = 2530944.

The previous prime is 11231399. The next prime is 11231431. The reversal of 11231430 is 3413211.

11231430 is a nontrivial binomial coefficient, being equal to C(4740, 2).

It is a super-2 number, since 2×112314302 = 252290039689800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16252 + ... + 16928.

It is an arithmetic number, because the mean of its divisors is an integer number (488160).

Almost surely, 211231430 is an apocalyptic number.

11231430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11231430 is the 4739-th triangular number and also the 2370-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11231430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15621120).

11231430 is an abundant number, since it is smaller than the sum of its proper divisors (20010810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11231430 is a wasteful number, since it uses less digits than its factorization.

11231430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 11231430 is about 3351.3325707843. The cubic root of 11231430 is about 223.9468810056.

Adding to 11231430 its reverse (3413211), we get a palindrome (14644641).

The spelling of 11231430 in words is "eleven million, two hundred thirty-one thousand, four hundred thirty".