312135438 has 16 divisors (see below), whose sum is σ = 651413376. Its totient is φ = 99521400.

The previous prime is 312135389. The next prime is 312135443. The reversal of 312135438 is 834531213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130788 + ... + 1131063.

It is an arithmetic number, because the mean of its divisors is an integer number (40713336).

Almost surely, 2^312135438 is an apocalyptic number.

312135438 is an abundant number, since it is smaller than the sum of its proper divisors (339277938).

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

312135438 is a wasteful number, since it uses less digits than its factorization.

312135438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261879.

The product of its digits is 8640, while the sum is 30.

The square root of 312135438 is about 17667.3551501067. The cubic root of 312135438 is about 678.3404151950.

The spelling of 312135438 in words is "three hundred twelve million, one hundred thirty-five thousand, four hundred thirty-eight".