11181390 has 64 divisors (see below), whose sum is σ = 30246912. Its totient is φ = 2620800.

The previous prime is 11181377. The next prime is 11181403. The reversal of 11181390 is 9318111.

It is an interprime number because it is at equal distance from previous prime (11181377) and next prime (11181403).

It is a self number, because there is not a number n which added to its sum of digits gives 11181390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9684 + ... + 10776.

It is an arithmetic number, because the mean of its divisors is an integer number (472608).

Almost surely, 2^11181390 is an apocalyptic number.

11181390 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 11181390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15123456).

11181390 is an abundant number, since it is smaller than the sum of its proper divisors (19065522).

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

11181390 is a wasteful number, since it uses less digits than its factorization.

11181390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145.

The product of its (nonzero) digits is 216, while the sum is 24.

The square root of 11181390 is about 3343.8585496399. The cubic root of 11181390 is about 223.6137982808.

The spelling of 11181390 in words is "eleven million, one hundred eighty-one thousand, three hundred ninety".