84670656 has 112 divisors (see below), whose sum is σ = 259835904. Its totient is φ = 23832576.

The previous prime is 84670643. The next prime is 84670657. The reversal of 84670656 is 65607648.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (84670657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97681 + ... + 98543.

Almost surely, 2^84670656 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 84670656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129917952).

84670656 is an abundant number, since it is smaller than the sum of its proper divisors (175165248).

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

84670656 is a wasteful number, since it uses less digits than its factorization.

84670656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 948 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 84670656 is about 9201.6659361227. The cubic root of 84670656 is about 439.1143618218.

The spelling of 84670656 in words is "eighty-four million, six hundred seventy thousand, six hundred fifty-six".