312981876 has 18 divisors (see below), whose sum is σ = 791148722. Its totient is φ = 104327280.

The previous prime is 312981871. The next prime is 312981887. The reversal of 312981876 is 678189213.

It can be written as a sum of positive squares in only one way, i.e., 179024400 + 133957476 = 13380^2 + 11574^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312981871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4346935 + ... + 4347006.

Almost surely, 2^312981876 is an apocalyptic number.

312981876 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

312981876 is an abundant number, since it is smaller than the sum of its proper divisors (478166846).

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

312981876 is a wasteful number, since it uses less digits than its factorization.

312981876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8693951 (or 8693946 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 312981876 is about 17691.2937910148. The cubic root of 312981876 is about 678.9530284044.

The spelling of 312981876 in words is "three hundred twelve million, nine hundred eighty-one thousand, eight hundred seventy-six".