57215648 has 48 divisors (see below), whose sum is σ = 130536000. Its totient is φ = 24178176.

The previous prime is 57215633. The next prime is 57215657. The reversal of 57215648 is 84651275.

It is a super-3 number, since 3×57215648³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14603 + ... + 18101.

It is an arithmetic number, because the mean of its divisors is an integer number (2719500).

Almost surely, 2^57215648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57215648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65268000).

57215648 is an abundant number, since it is smaller than the sum of its proper divisors (73320352).

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

57215648 is a wasteful number, since it uses less digits than its factorization.

57215648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589 (or 3581 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 57215648 is about 7564.1025905259. The cubic root of 57215648 is about 385.3348366087.

The spelling of 57215648 in words is "fifty-seven million, two hundred fifteen thousand, six hundred forty-eight".