28137149280 has 96 divisors (see below), whose sum is σ = 98480037600. Its totient is φ = 7503238656.

The previous prime is 28137149263. The next prime is 28137149309. The reversal of 28137149280 is 8294173182.

It is a happy number.

28137149280 is a `hidden beast` number, since 2 + 8 + 13 + 71 + 492 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3252295 + ... + 3260934.

It is an arithmetic number, because the mean of its divisors is an integer number (1025833725).

Almost surely, 2^28137149280 is an apocalyptic number.

28137149280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28137149280 is an abundant number, since it is smaller than the sum of its proper divisors (70342888320).

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

28137149280 is a wasteful number, since it uses less digits than its factorization.

28137149280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6513253 (or 6513239 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 28137149280 in words is "twenty-eight billion, one hundred thirty-seven million, one hundred forty-nine thousand, two hundred eighty".