57491772 has 36 divisors (see below), whose sum is σ = 145265400. Its totient is φ = 17689152.

The previous prime is 57491767. The next prime is 57491827. The reversal of 57491772 is 27719475.

57491772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12147 + ... + 16202.

It is an arithmetic number, because the mean of its divisors is an integer number (4035150).

Almost surely, 2^57491772 is an apocalyptic number.

57491772 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

57491772 is an abundant number, since it is smaller than the sum of its proper divisors (87773628).

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

57491772 is a wasteful number, since it uses less digits than its factorization.

57491772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28382 (or 28367 counting only the distinct ones).

The product of its digits is 123480, while the sum is 42.

The square root of 57491772 is about 7582.3328863879. The cubic root of 57491772 is about 385.9537202786.

The spelling of 57491772 in words is "fifty-seven million, four hundred ninety-one thousand, seven hundred seventy-two".