2158656 has 28 divisors (see below), whose sum is σ = 5711952. Its totient is φ = 719488.

The previous prime is 2158649. The next prime is 2158679. The reversal of 2158656 is 6568512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5430 + ... + 5813.

2^2158656 is an apocalyptic number.

It is an amenable number.

2158656 is an abundant number, since it is smaller than the sum of its proper divisors (3553296).

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

2158656 is a wasteful number, since it uses less digits than its factorization.

2158656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11258 (or 11248 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 2158656 is about 1469.2365364365. The cubic root of 2158656 is about 129.2392650964.

The spelling of 2158656 in words is "two million, one hundred fifty-eight thousand, six hundred fifty-six".