313781648 has 20 divisors (see below), whose sum is σ = 643714380. Its totient is φ = 147661824.

The previous prime is 313781639. The next prime is 313781681. The reversal of 313781648 is 846187313.

It can be written as a sum of positive squares in 2 ways, for example, as 97456384 + 216325264 = 9872^2 + 14708^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

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, 576533 + ... + 577076.

It is an arithmetic number, because the mean of its divisors is an integer number (32185719).

Almost surely, 2^313781648 is an apocalyptic number.

It is an amenable number.

313781648 is an abundant number, since it is smaller than the sum of its proper divisors (329932732).

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

313781648 is a wasteful number, since it uses less digits than its factorization.

313781648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153634 (or 1153628 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 313781648 is about 17713.8829170795. The cubic root of 313781648 is about 679.5308528700.

The spelling of 313781648 in words is "three hundred thirteen million, seven hundred eighty-one thousand, six hundred forty-eight".