84428705 has 8 divisors (see below), whose sum is σ = 103032000. Its totient is φ = 66397936.

The previous prime is 84428683. The next prime is 84428713. The reversal of 84428705 is 50782448.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84428705 - 2²⁴ = 67651489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142805 + ... + 143394.

It is an arithmetic number, because the mean of its divisors is an integer number (12879000).

Almost surely, 2^84428705 is an apocalyptic number.

It is an amenable number.

84428705 is a deficient number, since it is larger than the sum of its proper divisors (18603295).

84428705 is a wasteful number, since it uses less digits than its factorization.

84428705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286263.

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

The square root of 84428705 is about 9188.5094003326. The cubic root of 84428705 is about 438.6956984011.

The spelling of 84428705 in words is "eighty-four million, four hundred twenty-eight thousand, seven hundred five".