28081192004 has 12 divisors (see below), whose sum is σ = 49628642028. Its totient is φ = 13901580000.

The previous prime is 28081191997. The next prime is 28081192031. The reversal of 28081192004 is 40029118082.

It can be written as a sum of positive squares in 2 ways, for example, as 17358589504 + 10722602500 = 131752^2 + 103550^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34753547 + ... + 34754354.

It is an arithmetic number, because the mean of its divisors is an integer number (4135720169).

Almost surely, 2^28081192004 is an apocalyptic number.

It is an amenable number.

28081192004 is a deficient number, since it is larger than the sum of its proper divisors (21547450024).

28081192004 is a wasteful number, since it uses less digits than its factorization.

28081192004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69508006 (or 69508004 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 28081192004 in words is "twenty-eight billion, eighty-one million, one hundred ninety-two thousand, four".