28278330004 has 12 divisors (see below), whose sum is σ = 49925017044. Its totient is φ = 14014039424.

The previous prime is 28278329977. The next prime is 28278330013. The reversal of 28278330004 is 40003387282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 835094404 + 27443235600 = 28898^2 + 165660^2 .

It is a congruent number.

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, 31280887 + ... + 31281790.

It is an arithmetic number, because the mean of its divisors is an integer number (4160418087).

Almost surely, 2^28278330004 is an apocalyptic number.

It is an amenable number.

28278330004 is a deficient number, since it is larger than the sum of its proper divisors (21646687040).

28278330004 is a wasteful number, since it uses less digits than its factorization.

28278330004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62562794 (or 62562792 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 28278330004 in words is "twenty-eight billion, two hundred seventy-eight million, three hundred thirty thousand, four".