28387755472 has 20 divisors (see below), whose sum is σ = 55289246976. Its totient is φ = 14119562720.

The previous prime is 28387755433. The next prime is 28387755493. The reversal of 28387755472 is 27455778382.

It is a congruent number.

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, 4641538 + ... + 4647649.

Almost surely, 2^28387755472 is an apocalyptic number.

It is an amenable number.

28387755472 is a deficient number, since it is larger than the sum of its proper divisors (26901491504).

28387755472 is a wasteful number, since it uses less digits than its factorization.

28387755472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9289386 (or 9289380 counting only the distinct ones).

The product of its digits is 26342400, while the sum is 58.

The spelling of 28387755472 in words is "twenty-eight billion, three hundred eighty-seven million, seven hundred fifty-five thousand, four hundred seventy-two".