28631403304 has 32 divisors (see below), whose sum is σ = 61424700480. Its totient is φ = 12256262784.

The previous prime is 28631403277. The next prime is 28631403319. The reversal of 28631403304 is 40330413682.

It is a self number, because there is not a number n which added to its sum of digits gives 28631403304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250302 + ... + 346285.

It is an arithmetic number, because the mean of its divisors is an integer number (1919521890).

Almost surely, 2^28631403304 is an apocalyptic number.

It is an amenable number.

28631403304 is an abundant number, since it is smaller than the sum of its proper divisors (32793297176).

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

28631403304 is a wasteful number, since it uses less digits than its factorization.

28631403304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597457 (or 597453 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 28631403304 its reverse (40330413682), we get a palindrome (68961816986).

The spelling of 28631403304 in words is "twenty-eight billion, six hundred thirty-one million, four hundred three thousand, three hundred four".