2689904457 has 20 divisors (see below), whose sum is σ = 4020919056. Its totient is φ = 1792079640.

The previous prime is 2689904449. The next prime is 2689904471. The reversal of 2689904457 is 7544099862.

2689904457 is a `hidden beast` number, since 26 + 89 + 90 + 4 + 457 = 666.

It is not a de Polignac number, because 2689904457 - 2³ = 2689904449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2689904957) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 121582 + ... + 141992.

Almost surely, 2^2689904457 is an apocalyptic number.

2689904457 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2689904457 is a deficient number, since it is larger than the sum of its proper divisors (1331014599).

2689904457 is a wasteful number, since it uses less digits than its factorization.

2689904457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22050 (or 22041 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The square root of 2689904457 is about 51864.2888411670. The cubic root of 2689904457 is about 1390.7389506368.

The spelling of 2689904457 in words is "two billion, six hundred eighty-nine million, nine hundred four thousand, four hundred fifty-seven".