57091072 has 44 divisors (see below), whose sum is σ = 115287040. Its totient is φ = 28256256.

The previous prime is 57091063. The next prime is 57091081. The reversal of 57091072 is 27019075.

It is an interprime number because it is at equal distance from previous prime (57091063) and next prime (57091081).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129829 + ... + 130267.

It is an arithmetic number, because the mean of its divisors is an integer number (2620160).

Almost surely, 2^57091072 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 57091072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57643520).

57091072 is an abundant number, since it is smaller than the sum of its proper divisors (58195968).

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

57091072 is a wasteful number, since it uses less digits than its factorization.

57091072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 57091072 is about 7555.8634185644. The cubic root of 57091072 is about 385.0549693818.

The spelling of 57091072 in words is "fifty-seven million, ninety-one thousand, seventy-two".