28528738472 has 32 divisors (see below), whose sum is σ = 58059724800. Its totient is φ = 13063425984.

The previous prime is 28528738421. The next prime is 28528738523. The reversal of 28528738472 is 27483782582.

It is an interprime number because it is at equal distance from previous prime (28528738421) and next prime (28528738523).

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1066772 + ... + 1093187.

It is an arithmetic number, because the mean of its divisors is an integer number (1814366400).

Almost surely, 2^28528738472 is an apocalyptic number.

It is an amenable number.

28528738472 is an abundant number, since it is smaller than the sum of its proper divisors (29530986328).

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

28528738472 is a wasteful number, since it uses less digits than its factorization.

28528738472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160105 (or 2160101 counting only the distinct ones).

The product of its digits is 12042240, while the sum is 56.

The spelling of 28528738472 in words is "twenty-eight billion, five hundred twenty-eight million, seven hundred thirty-eight thousand, four hundred seventy-two".