28879800 has 96 divisors (see below), whose sum is σ = 90470400. Its totient is φ = 7620480.

The previous prime is 28879783. The next prime is 28879831. The reversal of 28879800 is 897882.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76011 + ... + 76389.

It is an arithmetic number, because the mean of its divisors is an integer number (942400).

Almost surely, 2^28879800 is an apocalyptic number.

28879800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28879800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45235200).

28879800 is an abundant number, since it is smaller than the sum of its proper divisors (61590600).

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

28879800 is a wasteful number, since it uses less digits than its factorization.

28879800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 28879800 is about 5373.9929289124. The cubic root of 28879800 is about 306.8066206393.

The spelling of 28879800 in words is "twenty-eight million, eight hundred seventy-nine thousand, eight hundred".