11428656 has 40 divisors (see below), whose sum is σ = 29645424. Its totient is φ = 3793920.

The previous prime is 11428649. The next prime is 11428667. The reversal of 11428656 is 65682411.

It is a super-2 number, since 2×11428656² = 261228355932672, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21676 + ... + 22196.

Almost surely, 2^11428656 is an apocalyptic number.

11428656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11428656 is an abundant number, since it is smaller than the sum of its proper divisors (18216768).

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

11428656 is a wasteful number, since it uses less digits than its factorization.

11428656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989 (or 983 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 11428656 is about 3380.6295271739. The cubic root of 11428656 is about 225.2501317030.

The spelling of 11428656 in words is "eleven million, four hundred twenty-eight thousand, six hundred fifty-six".