57491808 has 48 divisors (see below), whose sum is σ = 164638656. Its totient is φ = 17421440.

The previous prime is 57491767. The next prime is 57491827. The reversal of 57491808 is 80819475.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 57491808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26166 + ... + 28277.

It is an arithmetic number, because the mean of its divisors is an integer number (3429972).

Almost surely, 2^57491808 is an apocalyptic number.

It is an amenable number.

57491808 is an abundant number, since it is smaller than the sum of its proper divisors (107146848).

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

57491808 is a wasteful number, since it uses less digits than its factorization.

57491808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54467 (or 54459 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 57491808 is about 7582.3352603271. The cubic root of 57491808 is about 385.9538008370.

It can be divided in two parts, 5749 and 1808, that added together give a palindrome (7557).

The spelling of 57491808 in words is "fifty-seven million, four hundred ninety-one thousand, eight hundred eight".