11491830 has 192 divisors, whose sum is σ = 38413440. Its totient is φ = 2322432.

The previous prime is 11491807. The next prime is 11491841. The reversal of 11491830 is 3819411.

It is a junction number, because it is equal to n+sod(n) for n = 11491794 and 11491803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 310572 + ... + 310608.

It is an arithmetic number, because the mean of its divisors is an integer number (200070).

Almost surely, 2^11491830 is an apocalyptic number.

11491830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11491830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19206720).

11491830 is an abundant number, since it is smaller than the sum of its proper divisors (26921610).

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

11491830 is a wasteful number, since it uses less digits than its factorization.

11491830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 11491830 is about 3389.9601767572. The cubic root of 11491830 is about 225.6644065014.

It can be divided in two parts, 11491 and 830, that added together give a palindrome (12321).

The spelling of 11491830 in words is "eleven million, four hundred ninety-one thousand, eight hundred thirty".