84431256 has 128 divisors (see below), whose sum is σ = 264122880. Its totient is φ = 21897216.

The previous prime is 84431219. The next prime is 84431261. The reversal of 84431256 is 65213448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146040 + ... + 146616.

It is an arithmetic number, because the mean of its divisors is an integer number (2063460).

Almost surely, 2^84431256 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 84431256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132061440).

84431256 is an abundant number, since it is smaller than the sum of its proper divisors (179691624).

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

84431256 is a wasteful number, since it uses less digits than its factorization.

84431256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 669 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 84431256 is about 9188.6482139649. The cubic root of 84431256 is about 438.7001167304.

The spelling of 84431256 in words is "eighty-four million, four hundred thirty-one thousand, two hundred fifty-six".