57322920 has 128 divisors (see below), whose sum is σ = 179988480. Its totient is φ = 14592000.

The previous prime is 57322919. The next prime is 57322921. The reversal of 57322920 is 2922375.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (57322919) and next prime (57322921).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (57322921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300025 + ... + 300215.

It is an arithmetic number, because the mean of its divisors is an integer number (1406160).

Almost surely, 2^57322920 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 57322920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89994240).

57322920 is an abundant number, since it is smaller than the sum of its proper divisors (122665560).

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

57322920 is a wasteful number, since it uses less digits than its factorization.

57322920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 57322920 is about 7571.1901310164. The cubic root of 57322920 is about 385.5755040596.

The spelling of 57322920 in words is "fifty-seven million, three hundred twenty-two thousand, nine hundred twenty".