28012488 has 32 divisors (see below), whose sum is σ = 80036160. Its totient is φ = 8003520.

The previous prime is 28012477. The next prime is 28012507. The reversal of 28012488 is 88421082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83203 + ... + 83538.

It is an arithmetic number, because the mean of its divisors is an integer number (2501130).

Almost surely, 2^28012488 is an apocalyptic number.

28012488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28012488 is an abundant number, since it is smaller than the sum of its proper divisors (52023672).

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

28012488 is a wasteful number, since it uses less digits than its factorization.

28012488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166757 (or 166753 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 28012488 is about 5292.6824956727. The cubic root of 28012488 is about 303.7040344339.

The spelling of 28012488 in words is "twenty-eight million, twelve thousand, four hundred eighty-eight".