28635634734 has 64 divisors (see below), whose sum is σ = 69334258176. Its totient is φ = 7696871424.

The previous prime is 28635634697. The next prime is 28635634747. The reversal of 28635634734 is 43743653682.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1843669 + ... + 1859135.

It is an arithmetic number, because the mean of its divisors is an integer number (1083347784).

Almost surely, 2^28635634734 is an apocalyptic number.

28635634734 is an abundant number, since it is smaller than the sum of its proper divisors (40698623442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28635634734 is a wasteful number, since it uses less digits than its factorization.

28635634734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18089.

The product of its digits is 8709120, while the sum is 51.

The spelling of 28635634734 in words is "twenty-eight billion, six hundred thirty-five million, six hundred thirty-four thousand, seven hundred thirty-four".