57280628 has 6 divisors (see below), whose sum is σ = 100241106. Its totient is φ = 28640312.

The previous prime is 57280627. The next prime is 57280673. The reversal of 57280628 is 82608275.

It can be written as a sum of positive squares in only one way, i.e., 31494544 + 25786084 = 5612^2 + 5078^2 .

It is a junction number, because it is equal to n+sod(n) for n = 57280591 and 57280600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57280627) by changing a digit.

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 as a sum of consecutive naturals, namely, 7160075 + ... + 7160082.

It is an arithmetic number, because the mean of its divisors is an integer number (16706851).

Almost surely, 2^57280628 is an apocalyptic number.

It is an amenable number.

57280628 is a deficient number, since it is larger than the sum of its proper divisors (42960478).

57280628 is a wasteful number, since it uses less digits than its factorization.

57280628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14320161 (or 14320159 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 57280628 is about 7568.3966597953. The cubic root of 57280628 is about 385.4806567678.

The spelling of 57280628 in words is "fifty-seven million, two hundred eighty thousand, six hundred twenty-eight".