312838389 has 16 divisors (see below), whose sum is σ = 464587200. Its totient is φ = 208053648.

The previous prime is 312838381. The next prime is 312838417. The reversal of 312838389 is 983838213.

It is not a de Polignac number, because 312838389 - 2³ = 312838381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312838381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2514 + ... + 25139.

It is an arithmetic number, because the mean of its divisors is an integer number (29036700).

Almost surely, 2^312838389 is an apocalyptic number.

It is an amenable number.

312838389 is a deficient number, since it is larger than the sum of its proper divisors (151748811).

312838389 is a wasteful number, since it uses less digits than its factorization.

312838389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28081 (or 28075 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 312838389 is about 17687.2380263285. The cubic root of 312838389 is about 678.8492568742.

The spelling of 312838389 in words is "three hundred twelve million, eight hundred thirty-eight thousand, three hundred eighty-nine".