28338880 has 112 divisors (see below), whose sum is σ = 73152000. Its totient is φ = 10423296.

The previous prime is 28338859. The next prime is 28338889. The reversal of 28338880 is 8883382.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (28338889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358681 + ... + 358759.

Almost surely, 2^28338880 is an apocalyptic number.

28338880 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 28338880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36576000).

28338880 is an abundant number, since it is smaller than the sum of its proper divisors (44813120).

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

28338880 is a wasteful number, since it uses less digits than its factorization.

28338880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 28338880 is about 5323.4274673372. The cubic root of 28338880 is about 304.8790347145.

The spelling of 28338880 in words is "twenty-eight million, three hundred thirty-eight thousand, eight hundred eighty".