312499998 has 64 divisors (see below), whose sum is σ = 721612800. Its totient is φ = 100124640.

The previous prime is 312499987. The next prime is 312500017. The reversal of 312499998 is 899994213.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 674715 + ... + 675177.

It is an arithmetic number, because the mean of its divisors is an integer number (11275200).

Almost surely, 2^312499998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312499998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360806400).

312499998 is an abundant number, since it is smaller than the sum of its proper divisors (409112802).

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

312499998 is a wasteful number, since it uses less digits than its factorization.

312499998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 928 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 312499998 is about 17677.6694730951. The cubic root of 312499998 is about 678.6044027010.

The spelling of 312499998 in words is "three hundred twelve million, four hundred ninety-nine thousand, nine hundred ninety-eight".