28501488 has 30 divisors (see below), whose sum is σ = 79764984. Its totient is φ = 9500448.

The previous prime is 28501427. The next prime is 28501511. The reversal of 28501488 is 88410582.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98820 + ... + 99107.

Almost surely, 2^28501488 is an apocalyptic number.

It is an amenable number.

28501488 is an abundant number, since it is smaller than the sum of its proper divisors (51263496).

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

28501488 is a wasteful number, since it uses less digits than its factorization.

28501488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197941 (or 197932 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 28501488 is about 5338.6784881654. The cubic root of 28501488 is about 305.4610531236.

The spelling of 28501488 in words is "twenty-eight million, five hundred one thousand, four hundred eighty-eight".