28874736280 has 32 divisors (see below), whose sum is σ = 69965708400. Its totient is φ = 10661440896.

The previous prime is 28874736257. The next prime is 28874736281. The reversal of 28874736280 is 8263747882.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28874736281) 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, 27763650 + ... + 27764689.

Almost surely, 2^28874736280 is an apocalyptic number.

28874736280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28874736280 is an abundant number, since it is smaller than the sum of its proper divisors (41090972120).

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

28874736280 is a wasteful number, since it uses less digits than its factorization.

28874736280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55528363 (or 55528359 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 55.

The spelling of 28874736280 in words is "twenty-eight billion, eight hundred seventy-four million, seven hundred thirty-six thousand, two hundred eighty".