313321988 has 12 divisors (see below), whose sum is σ = 626644032. Its totient is φ = 134280840.

The previous prime is 313321973. The next prime is 313321997. The reversal of 313321988 is 889123313.

313321988 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5595008 + ... + 5595063.

It is an arithmetic number, because the mean of its divisors is an integer number (52220336).

Almost surely, 2^313321988 is an apocalyptic number.

It is an amenable number.

313321988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

313321988 is a wasteful number, since it uses less digits than its factorization.

313321988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11190082 (or 11190080 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 313321988 is about 17700.9035927548. The cubic root of 313321988 is about 679.1988748841.

The spelling of 313321988 in words is "three hundred thirteen million, three hundred twenty-one thousand, nine hundred eighty-eight".