28418688 has 80 divisors (see below), whose sum is σ = 84604410. Its totient is φ = 9469440.

The previous prime is 28418669. The next prime is 28418693. The reversal of 28418688 is 88681482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26132544 + 2286144 = 5112^2 + 1512^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8998 + ... + 11738.

Almost surely, 2^28418688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28418688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42302205).

28418688 is an abundant number, since it is smaller than the sum of its proper divisors (56185722).

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

28418688 is an equidigital number, since it uses as much as digits as its factorization.

28418688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767 (or 2746 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The square root of 28418688 is about 5330.9181197989. The cubic root of 28418688 is about 305.1649667461.

The spelling of 28418688 in words is "twenty-eight million, four hundred eighteen thousand, six hundred eighty-eight".