28791488 has 28 divisors (see below), whose sum is σ = 62328552. Its totient is φ = 13086720.

The previous prime is 28791481. The next prime is 28791527. The reversal of 28791488 is 88419782.

It is not an unprimeable number, because it can be changed into a prime (28791481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19745 + ... + 21152.

Almost surely, 2^28791488 is an apocalyptic number.

It is an amenable number.

28791488 is an abundant number, since it is smaller than the sum of its proper divisors (33537064).

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

28791488 is a wasteful number, since it uses less digits than its factorization.

28791488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40920 (or 40910 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 28791488 is about 5365.7700286166. The cubic root of 28791488 is about 306.4935717138.

The spelling of 28791488 in words is "twenty-eight million, seven hundred ninety-one thousand, four hundred eighty-eight".