57321648 has 40 divisors (see below), whose sum is σ = 164535600. Its totient is φ = 19107072.

The previous prime is 57321643. The next prime is 57321653. The reversal of 57321648 is 84612375.

57321648 is a `hidden beast` number, since 5 + 7 + 3 + 2 + 1 + 648 = 666.

It is an interprime number because it is at equal distance from previous prime (57321643) and next prime (57321653).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (57321643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65913 + ... + 66776.

It is an arithmetic number, because the mean of its divisors is an integer number (4113390).

Almost surely, 2^57321648 is an apocalyptic number.

It is an amenable number.

57321648 is an abundant number, since it is smaller than the sum of its proper divisors (107213952).

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

57321648 is a wasteful number, since it uses less digits than its factorization.

57321648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132706 (or 132694 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 57321648 is about 7571.1061279050. The cubic root of 57321648 is about 385.5726520552.

The spelling of 57321648 in words is "fifty-seven million, three hundred twenty-one thousand, six hundred forty-eight".