57426720 has 96 divisors (see below), whose sum is σ = 194830272. Its totient is φ = 14134272.

The previous prime is 57426689. The next prime is 57426739. The reversal of 57426720 is 2762475.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1639 + ... + 10841.

It is an arithmetic number, because the mean of its divisors is an integer number (2029482).

Almost surely, 2^57426720 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 57426720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97415136).

57426720 is an abundant number, since it is smaller than the sum of its proper divisors (137403552).

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

57426720 is a wasteful number, since it uses less digits than its factorization.

57426720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9234 (or 9226 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 57426720 is about 7578.0419634626. The cubic root of 57426720 is about 385.8080963278.

The spelling of 57426720 in words is "fifty-seven million, four hundred twenty-six thousand, seven hundred twenty".