28157563224 has 128 divisors (see below), whose sum is σ = 92471616000. Its totient is φ = 7767591552.

The previous prime is 28157563223. The next prime is 28157563241. The reversal of 28157563224 is 42236575182.

28157563224 is a `hidden beast` number, since 2 + 8 + 1 + 5 + 7 + 5 + 632 + 2 + 4 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28157563224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28157563223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277234 + ... + 364929.

It is an arithmetic number, because the mean of its divisors is an integer number (722434500).

Almost surely, 2^28157563224 is an apocalyptic number.

28157563224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28157563224 is an abundant number, since it is smaller than the sum of its proper divisors (64314052776).

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

28157563224 is a wasteful number, since it uses less digits than its factorization.

28157563224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642214 (or 642204 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The spelling of 28157563224 in words is "twenty-eight billion, one hundred fifty-seven million, five hundred sixty-three thousand, two hundred twenty-four".