57220384 has 48 divisors (see below), whose sum is σ = 122012352. Its totient is φ = 26258688.

The previous prime is 57220369. The next prime is 57220399. The reversal of 57220384 is 48302275.

It is an interprime number because it is at equal distance from previous prime (57220369) and next prime (57220399).

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 in 7 ways as a sum of consecutive naturals, for example, 109147 + ... + 109669.

It is an arithmetic number, because the mean of its divisors is an integer number (2541924).

Almost surely, 2^57220384 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 57220384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61006176).

57220384 is an abundant number, since it is smaller than the sum of its proper divisors (64791968).

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

57220384 is a wasteful number, since it uses less digits than its factorization.

57220384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 57220384 is about 7564.4156416738. The cubic root of 57220384 is about 385.3454682891.

The spelling of 57220384 in words is "fifty-seven million, two hundred twenty thousand, three hundred eighty-four".