57721492 has 6 divisors (see below), whose sum is σ = 101012618. Its totient is φ = 28860744.

The previous prime is 57721483. The next prime is 57721519. The reversal of 57721492 is 29412775.

It can be written as a sum of positive squares in only one way, i.e., 56610576 + 1110916 = 7524^2 + 1054^2 .

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 as a sum of consecutive naturals, namely, 7215183 + ... + 7215190.

Almost surely, 2^57721492 is an apocalyptic number.

It is an amenable number.

57721492 is a deficient number, since it is larger than the sum of its proper divisors (43291126).

57721492 is a wasteful number, since it uses less digits than its factorization.

57721492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14430377 (or 14430375 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 57721492 is about 7597.4661565551. The cubic root of 57721492 is about 386.4670891715.

The spelling of 57721492 in words is "fifty-seven million, seven hundred twenty-one thousand, four hundred ninety-two".