57230928 has 80 divisors (see below), whose sum is σ = 165644160. Its totient is φ = 18918144.

The previous prime is 57230917. The next prime is 57230939. The reversal of 57230928 is 82903275.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (57230917) and next prime (57230939).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 57230892 and 57230901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58701 + ... + 59667.

It is an arithmetic number, because the mean of its divisors is an integer number (2070552).

Almost surely, 2^57230928 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 57230928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82822080).

57230928 is an abundant number, since it is smaller than the sum of its proper divisors (108413232).

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

57230928 is a wasteful number, since it uses less digits than its factorization.

57230928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 57230928 is about 7565.1125569948. The cubic root of 57230928 is about 385.3691360382.

The spelling of 57230928 in words is "fifty-seven million, two hundred thirty thousand, nine hundred twenty-eight".