312320232 has 128 divisors (see below), whose sum is σ = 1006617600. Its totient is φ = 87873984.

The previous prime is 312320231. The next prime is 312320237. The reversal of 312320232 is 232023213.

It is a happy number.

312320232 is a `hidden beast` number, since 312 + 320 + 2 + 32 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (312320231) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 99763 + ... + 102845.

It is an arithmetic number, because the mean of its divisors is an integer number (7864200).

Almost surely, 2^312320232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312320232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (503308800).

312320232 is an abundant number, since it is smaller than the sum of its proper divisors (694297368).

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

312320232 is a wasteful number, since it uses less digits than its factorization.

312320232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172 (or 3162 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 312320232 is about 17672.5841913400. The cubic root of 312320232 is about 678.4742550755.

Adding to 312320232 its reverse (232023213), we get a palindrome (544343445).

The spelling of 312320232 in words is "three hundred twelve million, three hundred twenty thousand, two hundred thirty-two".