312031404 has 18 divisors (see below), whose sum is σ = 788746140. Its totient is φ = 104010456.

The previous prime is 312031381. The next prime is 312031411. The reversal of 312031404 is 404130213.

312031404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×312031404² = 194727194164422432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 5 ways as a sum of consecutive naturals, for example, 4333734 + ... + 4333805.

It is an arithmetic number, because the mean of its divisors is an integer number (43819230).

Almost surely, 2^312031404 is an apocalyptic number.

It is an amenable number.

312031404 is an abundant number, since it is smaller than the sum of its proper divisors (476714736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312031404 is a wasteful number, since it uses less digits than its factorization.

312031404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8667549 (or 8667544 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 312031404 is about 17664.4106609872. The cubic root of 312031404 is about 678.2650437377.

Adding to 312031404 its reverse (404130213), we get a palindrome (716161617).

The spelling of 312031404 in words is "three hundred twelve million, thirty-one thousand, four hundred four".