312640332 has 48 divisors (see below), whose sum is σ = 756467712. Its totient is φ = 100391040.

The previous prime is 312640331. The next prime is 312640337. The reversal of 312640332 is 233046213.

It is not an unprimeable number, because it can be changed into a prime (312640331) by changing a digit.

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, 84873 + ... + 88479.

It is an arithmetic number, because the mean of its divisors is an integer number (15759744).

Almost surely, 2^312640332 is an apocalyptic number.

It is an amenable number.

312640332 is an abundant number, since it is smaller than the sum of its proper divisors (443827380).

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

312640332 is a wasteful number, since it uses less digits than its factorization.

312640332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878 (or 3876 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 312640332 is about 17681.6382725131. The cubic root of 312640332 is about 678.7059675216.

Adding to 312640332 its reverse (233046213), we get a palindrome (545686545).

The spelling of 312640332 in words is "three hundred twelve million, six hundred forty thousand, three hundred thirty-two".