84388231 has 32 divisors (see below), whose sum is σ = 96307200. Its totient is φ = 73664640.

The previous prime is 84388229. The next prime is 84388237. The reversal of 84388231 is 13288348.

It is not a de Polignac number, because 84388231 - 2¹ = 84388229 is a prime.

It is a super-2 number, since 2×84388231² = 14242747062618722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84388237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1430280 + ... + 1430338.

It is an arithmetic number, because the mean of its divisors is an integer number (3009600).

Almost surely, 2^84388231 is an apocalyptic number.

84388231 is a deficient number, since it is larger than the sum of its proper divisors (11918969).

84388231 is a wasteful number, since it uses less digits than its factorization.

84388231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199.

The product of its digits is 36864, while the sum is 37.

The square root of 84388231 is about 9186.3067116225. The cubic root of 84388231 is about 438.6255855655.

The spelling of 84388231 in words is "eighty-four million, three hundred eighty-eight thousand, two hundred thirty-one".