28451106880 has 56 divisors (see below), whose sum is σ = 77427661248. Its totient is φ = 9754664448.

The previous prime is 28451106851. The next prime is 28451106889. The reversal of 28451106880 is 8860115482.

It is a tau number, because it is divible by the number of its divisors (56).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28451106889) 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, 6348454 + ... + 6352933.

It is an arithmetic number, because the mean of its divisors is an integer number (1382636808).

Almost surely, 2^28451106880 is an apocalyptic number.

28451106880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28451106880 is an abundant number, since it is smaller than the sum of its proper divisors (48976554368).

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

28451106880 is a wasteful number, since it uses less digits than its factorization.

28451106880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12701411 (or 12701401 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 28451106880 in words is "twenty-eight billion, four hundred fifty-one million, one hundred six thousand, eight hundred eighty".