312219394 has 32 divisors (see below), whose sum is σ = 504641520. Its totient is φ = 144571392.

The previous prime is 312219377. The next prime is 312219403. The reversal of 312219394 is 493912213.

It can be written as a sum of positive squares in 8 ways, for example, as 266832225 + 45387169 = 16335^2 + 6737^2 .

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 15 ways as a sum of consecutive naturals, for example, 155662 + ... + 157654.

Almost surely, 2^312219394 is an apocalyptic number.

312219394 is a deficient number, since it is larger than the sum of its proper divisors (192422126).

312219394 is a wasteful number, since it uses less digits than its factorization.

312219394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134.

The product of its digits is 11664, while the sum is 34.

The square root of 312219394 is about 17669.7310109690. The cubic root of 312219394 is about 678.4012281581.

The spelling of 312219394 in words is "three hundred twelve million, two hundred nineteen thousand, three hundred ninety-four".