312438404 has 6 divisors (see below), whose sum is σ = 546767214. Its totient is φ = 156219200.

The previous prime is 312438391. The next prime is 312438407. The reversal of 312438404 is 404834213.

It can be written as a sum of positive squares in only one way, i.e., 262764100 + 49674304 = 16210^2 + 7048^2 .

It is not an unprimeable number, because it can be changed into a prime (312438407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39054797 + ... + 39054804.

It is an arithmetic number, because the mean of its divisors is an integer number (91127869).

Almost surely, 2^312438404 is an apocalyptic number.

It is an amenable number.

312438404 is a deficient number, since it is larger than the sum of its proper divisors (234328810).

312438404 is a wasteful number, since it uses less digits than its factorization.

312438404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78109605 (or 78109603 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 312438404 is about 17675.9272458335. The cubic root of 312438404 is about 678.5598152810.

The spelling of 312438404 in words is "three hundred twelve million, four hundred thirty-eight thousand, four hundred four".