312897490 has 8 divisors (see below), whose sum is σ = 563215500. Its totient is φ = 125158992.

The previous prime is 312897469. The next prime is 312897509. The reversal of 312897490 is 94798213.

It can be written as a sum of positive squares in 2 ways, for example, as 284563161 + 28334329 = 16869^2 + 5323^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15644865 + ... + 15644884.

Almost surely, 2^312897490 is an apocalyptic number.

312897490 is a deficient number, since it is larger than the sum of its proper divisors (250318010).

312897490 is a wasteful number, since it uses less digits than its factorization.

312897490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31289756.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 312897490 is about 17688.9086718203. The cubic root of 312897490 is about 678.8920032731.

The spelling of 312897490 in words is "three hundred twelve million, eight hundred ninety-seven thousand, four hundred ninety".