312749998 has 16 divisors (see below), whose sum is σ = 534024576. Its totient is φ = 135978040.

The previous prime is 312749977. The next prime is 312749999. The reversal of 312749998 is 899947213.

It is a happy number.

It is a super-2 number, since 2×312749998² = 195625122498000008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312749999) 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, 308536 + ... + 309547.

It is an arithmetic number, because the mean of its divisors is an integer number (33376536).

Almost surely, 2^312749998 is an apocalyptic number.

312749998 is a deficient number, since it is larger than the sum of its proper divisors (221274578).

312749998 is a wasteful number, since it uses less digits than its factorization.

312749998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618119.

The product of its digits is 979776, while the sum is 52.

The square root of 312749998 is about 17684.7391272815. The cubic root of 312749998 is about 678.7853156414.

The spelling of 312749998 in words is "three hundred twelve million, seven hundred forty-nine thousand, nine hundred ninety-eight".