28662870 has 32 divisors (see below), whose sum is σ = 68934240. Its totient is φ = 7627520.

The previous prime is 28662869. The next prime is 28662883. The reversal of 28662870 is 7826682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23680 + ... + 24860.

It is an arithmetic number, because the mean of its divisors is an integer number (2154195).

Almost surely, 2^28662870 is an apocalyptic number.

28662870 is an abundant number, since it is smaller than the sum of its proper divisors (40271370).

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

28662870 is a wasteful number, since it uses less digits than its factorization.

28662870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 28662870 is about 5353.7715677828. The cubic root of 28662870 is about 306.0364987008.

The spelling of 28662870 in words is "twenty-eight million, six hundred sixty-two thousand, eight hundred seventy".