28792880 has 20 divisors (see below), whose sum is σ = 66943632. Its totient is φ = 11517120.

The previous prime is 28792873. The next prime is 28792889. The reversal of 28792880 is 8829782.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (28792889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179876 + ... + 180035.

Almost surely, 2^28792880 is an apocalyptic number.

28792880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28792880 is an abundant number, since it is smaller than the sum of its proper divisors (38150752).

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

28792880 is a wasteful number, since it uses less digits than its factorization.

28792880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359924 (or 359918 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 28792880 is about 5365.8997381613. The cubic root of 28792880 is about 306.4985110461.

The spelling of 28792880 in words is "twenty-eight million, seven hundred ninety-two thousand, eight hundred eighty".