57308020 has 144 divisors (see below), whose sum is σ = 160876800. Its totient is φ = 16727040.

The previous prime is 57308011. The next prime is 57308081. The reversal of 57308020 is 2080375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 287881 + ... + 288079.

It is an arithmetic number, because the mean of its divisors is an integer number (1117200).

Almost surely, 2^57308020 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 57308020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80438400).

57308020 is an abundant number, since it is smaller than the sum of its proper divisors (103568780).

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

57308020 is a wasteful number, since it uses less digits than its factorization.

57308020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 57308020 is about 7570.2060738133. The cubic root of 57308020 is about 385.5420934980.

Adding to 57308020 its reverse (2080375), we get a palindrome (59388395).

The spelling of 57308020 in words is "fifty-seven million, three hundred eight thousand, twenty".