28818870 has 32 divisors (see below), whose sum is σ = 69672960. Its totient is φ = 7628640.

The previous prime is 28818863. The next prime is 28818883. The reversal of 28818870 is 7881882.

It is a happy number.

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, 715 + ... + 7625.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^28818870 is an apocalyptic number.

28818870 is an abundant number, since it is smaller than the sum of its proper divisors (40854090).

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

28818870 is a wasteful number, since it uses less digits than its factorization.

28818870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7060.

The product of its (nonzero) digits is 57344, while the sum is 42.

The square root of 28818870 is about 5368.3209665593. The cubic root of 28818870 is about 306.5907039851.

The spelling of 28818870 in words is "twenty-eight million, eight hundred eighteen thousand, eight hundred seventy".