28635829388 has 24 divisors (see below), whose sum is σ = 50822024400. Its totient is φ = 14116179968.

The previous prime is 28635829381. The next prime is 28635829421. The reversal of 28635829388 is 88392853682.

It is a self number, because there is not a number n which added to its sum of digits gives 28635829388.

It is not an unprimeable number, because it can be changed into a prime (28635829381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7628 + ... + 239436.

It is an arithmetic number, because the mean of its divisors is an integer number (2117584350).

Almost surely, 2^28635829388 is an apocalyptic number.

It is an amenable number.

28635829388 is a deficient number, since it is larger than the sum of its proper divisors (22186195012).

28635829388 is a wasteful number, since it uses less digits than its factorization.

28635829388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232249 (or 232247 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 62.

The spelling of 28635829388 in words is "twenty-eight billion, six hundred thirty-five million, eight hundred twenty-nine thousand, three hundred eighty-eight".