28725156352 has 20 divisors (see below), whose sum is σ = 57394209906. Its totient is φ = 14362577920.

The previous prime is 28725156337. The next prime is 28725156367. The reversal of 28725156352 is 25365152782.

It is an interprime number because it is at equal distance from previous prime (28725156337) and next prime (28725156367).

It can be written as a sum of positive squares in only one way, i.e., 14596505856 + 14128650496 = 120816^2 + 118864^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28051399 + ... + 28052422.

Almost surely, 2^28725156352 is an apocalyptic number.

It is an amenable number.

28725156352 is a deficient number, since it is larger than the sum of its proper divisors (28669053554).

28725156352 is an frugal number, since it uses more digits than its factorization.

28725156352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56103839 (or 56103823 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 46.

The spelling of 28725156352 in words is "twenty-eight billion, seven hundred twenty-five million, one hundred fifty-six thousand, three hundred fifty-two".