28078732602 has 24 divisors (see below), whose sum is σ = 60844107636. Its totient is φ = 9358523136.

The previous prime is 28078732579. The next prime is 28078732613. The reversal of 28078732602 is 20623787082.

28078732602 is a `hidden beast` number, since 2 + 8 + 0 + 7 + 8 + 7 + 32 + 602 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27929428641 + 149303961 = 167121^2 + 12219^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85608 + ... + 251964.

Almost surely, 2^28078732602 is an apocalyptic number.

28078732602 is an abundant number, since it is smaller than the sum of its proper divisors (32765375034).

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

28078732602 is a wasteful number, since it uses less digits than its factorization.

28078732602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175742 (or 175739 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 28078732602 in words is "twenty-eight billion, seventy-eight million, seven hundred thirty-two thousand, six hundred two".