84256878 has 16 divisors (see below), whose sum is σ = 168621696. Its totient is φ = 28067640.

The previous prime is 84256877. The next prime is 84256883. The reversal of 84256878 is 87865248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84256873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8575 + ... + 15557.

It is an arithmetic number, because the mean of its divisors is an integer number (10538856).

Almost surely, 2^84256878 is an apocalyptic number.

84256878 is an abundant number, since it is smaller than the sum of its proper divisors (84364818).

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

84256878 is a wasteful number, since it uses less digits than its factorization.

84256878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8999.

The product of its digits is 860160, while the sum is 48.

The square root of 84256878 is about 9179.1545362304. The cubic root of 84256878 is about 438.3978891011.

The spelling of 84256878 in words is "eighty-four million, two hundred fifty-six thousand, eight hundred seventy-eight".