312678020 has 12 divisors (see below), whose sum is σ = 656623884. Its totient is φ = 125071200.

The previous prime is 312678019. The next prime is 312678049. The reversal of 312678020 is 20876213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 150013504 + 162664516 = 12248^2 + 12754^2 .

It is a super-2 number, since 2×312678020² = 195535088382240800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7816931 + ... + 7816970.

It is an arithmetic number, because the mean of its divisors is an integer number (54718657).

Almost surely, 2^312678020 is an apocalyptic number.

It is an amenable number.

312678020 is an abundant number, since it is smaller than the sum of its proper divisors (343945864).

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

312678020 is a wasteful number, since it uses less digits than its factorization.

312678020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15633910 (or 15633908 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 312678020 is about 17682.7039787471. The cubic root of 312678020 is about 678.7332385208.

The spelling of 312678020 in words is "three hundred twelve million, six hundred seventy-eight thousand, twenty".