84428570 has 32 divisors (see below), whose sum is σ = 157852800. Its totient is φ = 32474176.

The previous prime is 84428569. The next prime is 84428581. The reversal of 84428570 is 7582448.

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, 100211 + ... + 101049.

It is an arithmetic number, because the mean of its divisors is an integer number (4932900).

Almost surely, 2^84428570 is an apocalyptic number.

84428570 is a deficient number, since it is larger than the sum of its proper divisors (73424230).

84428570 is a wasteful number, since it uses less digits than its factorization.

84428570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 84428570 is about 9188.5020541980. The cubic root of 84428570 is about 438.6954645788.

The spelling of 84428570 in words is "eighty-four million, four hundred twenty-eight thousand, five hundred seventy".