28706872 has 16 divisors (see below), whose sum is σ = 56658600. Its totient is φ = 13597920.

The previous prime is 28706833. The next prime is 28706879. The reversal of 28706872 is 27860782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28706879) 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, 94279 + ... + 94582.

Almost surely, 2^28706872 is an apocalyptic number.

It is an amenable number.

28706872 is a deficient number, since it is larger than the sum of its proper divisors (27951728).

28706872 is a wasteful number, since it uses less digits than its factorization.

28706872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188886 (or 188882 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 28706872 is about 5357.8794312676. The cubic root of 28706872 is about 306.1930233029.

The spelling of 28706872 in words is "twenty-eight million, seven hundred six thousand, eight hundred seventy-two".