2156908 has 12 divisors (see below), whose sum is σ = 4065040. Its totient is φ = 995472.

The previous prime is 2156897. The next prime is 2156939. The reversal of 2156908 is 8096512.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2156908.

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, 20688 + ... + 20791.

2^2156908 is an apocalyptic number.

It is an amenable number.

2156908 is a deficient number, since it is larger than the sum of its proper divisors (1908132).

2156908 is a wasteful number, since it uses less digits than its factorization.

2156908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41496 (or 41494 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2156908 is about 1468.6415491875. The cubic root of 2156908 is about 129.2043712797.

The spelling of 2156908 in words is "two million, one hundred fifty-six thousand, nine hundred eight".