313881840 has 60 divisors (see below), whose sum is σ = 1054122264. Its totient is φ = 83701632.

The previous prime is 313881833. The next prime is 313881859. The reversal of 313881840 is 48188313.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 313881795 and 313881804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217254 + ... + 218693.

Almost surely, 2^313881840 is an apocalyptic number.

313881840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

313881840 is an abundant number, since it is smaller than the sum of its proper divisors (740240424).

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

313881840 is a wasteful number, since it uses less digits than its factorization.

313881840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435966 (or 435957 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 313881840 is about 17716.7107556679. The cubic root of 313881840 is about 679.6031710042.

It can be divided in two parts, 313881 and 840, that added together give a square (314721 = 561²).

The spelling of 313881840 in words is "three hundred thirteen million, eight hundred eighty-one thousand, eight hundred forty".