57642291 has 48 divisors (see below), whose sum is σ = 101896704. Its totient is φ = 30650112.

The previous prime is 57642251. The next prime is 57642293. The reversal of 57642291 is 19224675.

57642291 is a `hidden beast` number, since 5 + 7 + 642 + 2 + 9 + 1 = 666.

It is not a de Polignac number, because 57642291 - 2¹⁰ = 57641267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57642293) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114346 + ... + 114848.

It is an arithmetic number, because the mean of its divisors is an integer number (2122848).

Almost surely, 2^57642291 is an apocalyptic number.

57642291 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

57642291 is a deficient number, since it is larger than the sum of its proper divisors (44254413).

57642291 is a wasteful number, since it uses less digits than its factorization.

57642291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 637 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 57642291 is about 7592.2520374392. The cubic root of 57642291 is about 386.2902481074.

The spelling of 57642291 in words is "fifty-seven million, six hundred forty-two thousand, two hundred ninety-one".