28765587304 has 16 divisors (see below), whose sum is σ = 54055606500. Its totient is φ = 14350758912.

The previous prime is 28765587271. The next prime is 28765587313. The reversal of 28765587304 is 40378556782.

It can be written as a sum of positive squares in 2 ways, for example, as 27992636100 + 772951204 = 167310^2 + 27802^2 .

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, 4000527 + ... + 4007710.

Almost surely, 2^28765587304 is an apocalyptic number.

It is an amenable number.

28765587304 is a deficient number, since it is larger than the sum of its proper divisors (25290019196).

28765587304 is a wasteful number, since it uses less digits than its factorization.

28765587304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8008692 (or 8008688 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 28765587304 in words is "twenty-eight billion, seven hundred sixty-five million, five hundred eighty-seven thousand, three hundred four".