28507888 has 10 divisors (see below), whose sum is σ = 55234064. Its totient is φ = 14253936.

The previous prime is 28507867. The next prime is 28507889. The reversal of 28507888 is 88870582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28507889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890856 + ... + 890887.

Almost surely, 2^28507888 is an apocalyptic number.

It is an amenable number.

28507888 is a deficient number, since it is larger than the sum of its proper divisors (26726176).

28507888 is a wasteful number, since it uses less digits than its factorization.

28507888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781751 (or 1781745 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 46.

The square root of 28507888 is about 5339.2778537926. The cubic root of 28507888 is about 305.4839151396.

The spelling of 28507888 in words is "twenty-eight million, five hundred seven thousand, eight hundred eighty-eight".