57280304 has 20 divisors (see below), whose sum is σ = 115806576. Its totient is φ = 27394752.

The previous prime is 57280297. The next prime is 57280309. The reversal of 57280304 is 40308275.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (57280309) 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 in 3 ways as a sum of consecutive naturals, for example, 77459 + ... + 78194.

Almost surely, 2^57280304 is an apocalyptic number.

It is an amenable number.

57280304 is an abundant number, since it is smaller than the sum of its proper divisors (58526272).

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

57280304 is a wasteful number, since it uses less digits than its factorization.

57280304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155684 (or 155678 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 57280304 is about 7568.3752549672. The cubic root of 57280304 is about 385.4799299603.

Adding to 57280304 its reverse (40308275), we get a palindrome (97588579).

The spelling of 57280304 in words is "fifty-seven million, two hundred eighty thousand, three hundred four".