28531270372 has 24 divisors (see below), whose sum is σ = 54476053632. Its totient is φ = 12967029600.

The previous prime is 28531270331. The next prime is 28531270379. The reversal of 28531270372 is 27307213582.

It is not an unprimeable number, because it can be changed into a prime (28531270379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325797 + ... + 403987.

It is an arithmetic number, because the mean of its divisors is an integer number (2269835568).

Almost surely, 2^28531270372 is an apocalyptic number.

28531270372 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28531270372 is a deficient number, since it is larger than the sum of its proper divisors (25944783260).

28531270372 is a wasteful number, since it uses less digits than its factorization.

28531270372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86499 (or 86497 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 28531270372 in words is "twenty-eight billion, five hundred thirty-one million, two hundred seventy thousand, three hundred seventy-two".