57021948 has 24 divisors (see below), whose sum is σ = 147834960. Its totient is φ = 19007280.

The previous prime is 57021931. The next prime is 57021949. The reversal of 57021948 is 84912075.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57021949) 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, 263883 + ... + 264098.

It is an arithmetic number, because the mean of its divisors is an integer number (6159790).

Almost surely, 2^57021948 is an apocalyptic number.

It is an amenable number.

57021948 is an abundant number, since it is smaller than the sum of its proper divisors (90813012).

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

57021948 is a wasteful number, since it uses less digits than its factorization.

57021948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527994 (or 527986 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 57021948 is about 7551.2878371838. The cubic root of 57021948 is about 384.8995026386.

The spelling of 57021948 in words is "fifty-seven million, twenty-one thousand, nine hundred forty-eight".