2157837408 has 60 divisors (see below), whose sum is σ = 6346147500. Its totient is φ = 719278272.

The previous prime is 2157837349. The next prime is 2157837449. The reversal of 2157837408 is 8047387512.

2157837408 is a `hidden beast` number, since 2 + 1 + 578 + 3 + 74 + 0 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 413658 + ... + 418841.

It is an arithmetic number, because the mean of its divisors is an integer number (105769125).

Almost surely, 2^2157837408 is an apocalyptic number.

It is an amenable number.

2157837408 is an abundant number, since it is smaller than the sum of its proper divisors (4188310092).

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

2157837408 is an equidigital number, since it uses as much as digits as its factorization.

2157837408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832521 (or 832504 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 2157837408 is about 46452.5285425885. The cubic root of 2157837408 is about 1292.2292659628.

The spelling of 2157837408 in words is "two billion, one hundred fifty-seven million, eight hundred thirty-seven thousand, four hundred eight".