84070656 has 72 divisors (see below), whose sum is σ = 248632160. Its totient is φ = 28021248.

The previous prime is 84070643. The next prime is 84070663. The reversal of 84070656 is 65607048.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 84070656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831 + ... + 12993.

Almost surely, 2^84070656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84070656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124316080).

84070656 is an abundant number, since it is smaller than the sum of its proper divisors (164561504).

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

84070656 is a wasteful number, since it uses less digits than its factorization.

84070656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12188 (or 12168 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 84070656 is about 9169.0051804980. The cubic root of 84070656 is about 438.0746729507.

The spelling of 84070656 in words is "eighty-four million, seventy thousand, six hundred fifty-six".