84423918 has 16 divisors (see below), whose sum is σ = 169793280. Its totient is φ = 27983736.

The previous prime is 84423917. The next prime is 84423919. The reversal of 84423918 is 81932448.

It is an interprime number because it is at equal distance from previous prime (84423917) and next prime (84423919).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84423917) 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, 38230 + ... + 40377.

It is an arithmetic number, because the mean of its divisors is an integer number (10612080).

Almost surely, 2^84423918 is an apocalyptic number.

84423918 is an abundant number, since it is smaller than the sum of its proper divisors (85369362).

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

84423918 is a wasteful number, since it uses less digits than its factorization.

84423918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78791.

The product of its digits is 55296, while the sum is 39.

The square root of 84423918 is about 9188.2489082523. The cubic root of 84423918 is about 438.6874070820.

The spelling of 84423918 in words is "eighty-four million, four hundred twenty-three thousand, nine hundred eighteen".