312707690 has 16 divisors (see below), whose sum is σ = 595984392. Its totient is φ = 117725184.

The previous prime is 312707677. The next prime is 312707711. The reversal of 312707690 is 96707213.

It can be written as a sum of positive squares in 4 ways, for example, as 236267641 + 76440049 = 15371^2 + 8743^2 .

It is a super-2 number, since 2×312707690² = 195572198770272200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312707690.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919559 + ... + 919898.

Almost surely, 2^312707690 is an apocalyptic number.

312707690 is a deficient number, since it is larger than the sum of its proper divisors (283276702).

312707690 is a wasteful number, since it uses less digits than its factorization.

312707690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839481.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 312707690 is about 17683.5429142466. The cubic root of 312707690 is about 678.7547061616.

The spelling of 312707690 in words is "three hundred twelve million, seven hundred seven thousand, six hundred ninety".