28015291792 has 20 divisors (see below), whose sum is σ = 54286617820. Its totient is φ = 14005842048.

The previous prime is 28015291771. The next prime is 28015291807. The reversal of 28015291792 is 29719251082.

It can be written as a sum of positive squares in 2 ways, for example, as 22309604496 + 5705687296 = 149364^2 + 75536^2 .

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, 20134 + ... + 237562.

It is an arithmetic number, because the mean of its divisors is an integer number (2714330891).

Almost surely, 2^28015291792 is an apocalyptic number.

It is an amenable number.

28015291792 is a deficient number, since it is larger than the sum of its proper divisors (26271326028).

28015291792 is a wasteful number, since it uses less digits than its factorization.

28015291792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225490 (or 225484 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 28015291792 in words is "twenty-eight billion, fifteen million, two hundred ninety-one thousand, seven hundred ninety-two".