28387755473 has 32 divisors (see below), whose sum is σ = 37552232448. Its totient is φ = 20775916800.

The previous prime is 28387755433. The next prime is 28387755493. The reversal of 28387755473 is 37455778382.

It is a cyclic number.

It is not a de Polignac number, because 28387755473 - 2⁸ = 28387755217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28387755433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 615218 + ... + 659748.

It is an arithmetic number, because the mean of its divisors is an integer number (1173507264).

Almost surely, 2^28387755473 is an apocalyptic number.

It is an amenable number.

28387755473 is a deficient number, since it is larger than the sum of its proper divisors (9164476975).

28387755473 is a wasteful number, since it uses less digits than its factorization.

28387755473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45053.

The product of its digits is 39513600, while the sum is 59.

The spelling of 28387755473 in words is "twenty-eight billion, three hundred eighty-seven million, seven hundred fifty-five thousand, four hundred seventy-three".