28634430785 has 16 divisors (see below), whose sum is σ = 36372853440. Its totient is φ = 21603261120.

The previous prime is 28634430767. The next prime is 28634430857. The reversal of 28634430785 is 58703443682.

It is not a de Polignac number, because 28634430785 - 2²⁰ = 28633382209 is a prime.

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, 2290031 + ... + 2302500.

It is an arithmetic number, because the mean of its divisors is an integer number (2273303340).

Almost surely, 2^28634430785 is an apocalyptic number.

It is an amenable number.

28634430785 is a deficient number, since it is larger than the sum of its proper divisors (7738422655).

28634430785 is a wasteful number, since it uses less digits than its factorization.

28634430785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592608.

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 28634430785 in words is "twenty-eight billion, six hundred thirty-four million, four hundred thirty thousand, seven hundred eighty-five".