28290079872 has 64 divisors (see below), whose sum is σ = 83495037600. Its totient is φ = 9430025472.

The previous prime is 28290079841. The next prime is 28290079877. The reversal of 28290079872 is 27897009282.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28290079877) 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, 4089438 + ... + 4096349.

Almost surely, 2^28290079872 is an apocalyptic number.

It is an amenable number.

28290079872 is an abundant number, since it is smaller than the sum of its proper divisors (55204957728).

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

28290079872 is an equidigital number, since it uses as much as digits as its factorization.

28290079872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8185810 (or 8185792 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 28290079872 in words is "twenty-eight billion, two hundred ninety million, seventy-nine thousand, eight hundred seventy-two".