57328740 has 144 divisors (see below), whose sum is σ = 200648448. Its totient is φ = 12978432.

The previous prime is 57328723. The next prime is 57328759. The reversal of 57328740 is 4782375.

57328740 is a `hidden beast` number, since 573 + 2 + 87 + 4 + 0 = 666.

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 = 57328695 and 57328704.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217849 + ... + 218111.

It is an arithmetic number, because the mean of its divisors is an integer number (1393392).

Almost surely, 2^57328740 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 57328740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100324224).

57328740 is an abundant number, since it is smaller than the sum of its proper divisors (143319708).

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

57328740 is a wasteful number, since it uses less digits than its factorization.

57328740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 57328740 is about 7571.5744729878. The cubic root of 57328740 is about 385.5885527871.

The spelling of 57328740 in words is "fifty-seven million, three hundred twenty-eight thousand, seven hundred forty".