28536870 has 32 divisors (see below), whose sum is σ = 70852320. Its totient is φ = 7347200.

The previous prime is 28536857. The next prime is 28536881. The reversal of 28536870 is 7863582.

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, 15531 + ... + 17270.

It is an arithmetic number, because the mean of its divisors is an integer number (2214135).

Almost surely, 2^28536870 is an apocalyptic number.

28536870 is an abundant number, since it is smaller than the sum of its proper divisors (42315450).

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

28536870 is a wasteful number, since it uses less digits than its factorization.

28536870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32840.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28536870 is about 5341.9912017898. The cubic root of 28536870 is about 305.5874015415.

The spelling of 28536870 in words is "twenty-eight million, five hundred thirty-six thousand, eight hundred seventy".