11979690 has 32 divisors (see below), whose sum is σ = 30265920. Its totient is φ = 3026304.

The previous prime is 11979659. The next prime is 11979719. The reversal of 11979690 is 9697911.

It is a super-2 number, since 2×11979690² = 287025944992200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9939 + ... + 11078.

It is an arithmetic number, because the mean of its divisors is an integer number (945810).

Almost surely, 2^11979690 is an apocalyptic number.

11979690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11979690 is an abundant number, since it is smaller than the sum of its proper divisors (18286230).

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

11979690 is a wasteful number, since it uses less digits than its factorization.

11979690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21046.

The product of its (nonzero) digits is 30618, while the sum is 42.

The square root of 11979690 is about 3461.1688777059. The cubic root of 11979690 is about 228.8136136495.

The spelling of 11979690 in words is "eleven million, nine hundred seventy-nine thousand, six hundred ninety".