28458732665 has 16 divisors (see below), whose sum is σ = 39215862720. Its totient is φ = 19607929920.

The previous prime is 28458732647. The next prime is 28458732677. The reversal of 28458732665 is 56623785482.

It is not a de Polignac number, because 28458732665 - 2¹⁴ = 28458716281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28458732665.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13615574 + ... + 13617663.

It is an arithmetic number, because the mean of its divisors is an integer number (2450991420).

Almost surely, 2^28458732665 is an apocalyptic number.

It is an amenable number.

28458732665 is a deficient number, since it is larger than the sum of its proper divisors (10757130055).

28458732665 is a wasteful number, since it uses less digits than its factorization.

28458732665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27233272.

The product of its digits is 19353600, while the sum is 56.

The spelling of 28458732665 in words is "twenty-eight billion, four hundred fifty-eight million, seven hundred thirty-two thousand, six hundred sixty-five".