28188608 has 28 divisors (see below), whose sum is σ = 63928752. Its totient is φ = 12080640.

The previous prime is 28188583. The next prime is 28188613. The reversal of 28188608 is 80688182.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31013 + ... + 31908.

Almost surely, 2^28188608 is an apocalyptic number.

28188608 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28188608 is an abundant number, since it is smaller than the sum of its proper divisors (35740144).

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

28188608 is an equidigital number, since it uses as much as digits as its factorization.

28188608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62940 (or 62930 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 28188608 is about 5309.2944917381. The cubic root of 28188608 is about 304.3391874318.

The spelling of 28188608 in words is "twenty-eight million, one hundred eighty-eight thousand, six hundred eight".