28231907004 has 72 divisors (see below), whose sum is σ = 86356434528. Its totient is φ = 7591772160.

The previous prime is 28231906999. The next prime is 28231907027. The reversal of 28231907004 is 40070913282.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28231907004.

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 23 ways as a sum of consecutive naturals, for example, 3290757 + ... + 3299324.

It is an arithmetic number, because the mean of its divisors is an integer number (1199394924).

Almost surely, 2^28231907004 is an apocalyptic number.

It is an amenable number.

28231907004 is an abundant number, since it is smaller than the sum of its proper divisors (58124527524).

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

28231907004 is a wasteful number, since it uses less digits than its factorization.

28231907004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6590115 (or 6590110 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 28231907004 in words is "twenty-eight billion, two hundred thirty-one million, nine hundred seven thousand, four".