84312018 has 48 divisors (see below), whose sum is σ = 209401920. Its totient is φ = 24016608.

The previous prime is 84312017. The next prime is 84312023. The reversal of 84312018 is 81021348.

It is a junction number, because it is equal to n+sod(n) for n = 84311982 and 84312000.

It is not an unprimeable number, because it can be changed into a prime (84312017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51996 + ... + 53592.

It is an arithmetic number, because the mean of its divisors is an integer number (4362540).

Almost surely, 2^84312018 is an apocalyptic number.

84312018 is an abundant number, since it is smaller than the sum of its proper divisors (125089902).

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

84312018 is a wasteful number, since it uses less digits than its factorization.

84312018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031 (or 2028 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 84312018 is about 9182.1575895864. The cubic root of 84312018 is about 438.4935014273.

The spelling of 84312018 in words is "eighty-four million, three hundred twelve thousand, eighteen".