84784656 has 80 divisors (see below), whose sum is σ = 241413120. Its totient is φ = 25426560.

The previous prime is 84784621. The next prime is 84784697. The reversal of 84784656 is 65648748.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53605 + ... + 55163.

It is an arithmetic number, because the mean of its divisors is an integer number (3017664).

Almost surely, 2^84784656 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 84784656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120706560).

84784656 is an abundant number, since it is smaller than the sum of its proper divisors (156628464).

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

84784656 is a wasteful number, since it uses less digits than its factorization.

84784656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684 (or 1678 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The square root of 84784656 is about 9207.8583829249. The cubic root of 84784656 is about 439.3113469798.

The spelling of 84784656 in words is "eighty-four million, seven hundred eighty-four thousand, six hundred fifty-six".