57326720 has 128 divisors (see below), whose sum is σ = 158630400. Its totient is φ = 19578880.

The previous prime is 57326713. The next prime is 57326747. The reversal of 57326720 is 2762375.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 119441 + ... + 119919.

It is an arithmetic number, because the mean of its divisors is an integer number (1239300).

Almost surely, 2^57326720 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 57326720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79315200).

57326720 is an abundant number, since it is smaller than the sum of its proper divisors (101303680).

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

57326720 is a wasteful number, since it uses less digits than its factorization.

57326720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 57326720 is about 7571.4410781568. The cubic root of 57326720 is about 385.5840239474.

The spelling of 57326720 in words is "fifty-seven million, three hundred twenty-six thousand, seven hundred twenty".