28213970052 has 12 divisors (see below), whose sum is σ = 65832596816. Its totient is φ = 9404656680.

The previous prime is 28213970033. The next prime is 28213970089. The reversal of 28213970052 is 25007931282.

It is a tau number, because it is divible by the number of its divisors (12).

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, 1175582074 + ... + 1175582097.

Almost surely, 2^28213970052 is an apocalyptic number.

It is an amenable number.

28213970052 is an abundant number, since it is smaller than the sum of its proper divisors (37618626764).

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

28213970052 is a wasteful number, since it uses less digits than its factorization.

28213970052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351164178 (or 2351164176 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 28213970052 in words is "twenty-eight billion, two hundred thirteen million, nine hundred seventy thousand, fifty-two".