57033720 has 160 divisors (see below), whose sum is σ = 198633600. Its totient is φ = 14660352.

The previous prime is 57033709. The next prime is 57033737. The reversal of 57033720 is 2733075.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 93657 + ... + 94263.

It is an arithmetic number, because the mean of its divisors is an integer number (1241460).

Almost surely, 2^57033720 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 57033720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99316800).

57033720 is an abundant number, since it is smaller than the sum of its proper divisors (141599880).

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

57033720 is a wasteful number, since it uses less digits than its factorization.

57033720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 27.

The square root of 57033720 is about 7552.0672666496. The cubic root of 57033720 is about 384.9259879093.

Adding to 57033720 its reverse (2733075), we get a palindrome (59766795).

The spelling of 57033720 in words is "fifty-seven million, thirty-three thousand, seven hundred twenty".