319720 has 16 divisors (see below), whose sum is σ = 719460. Its totient is φ = 127872.

The previous prime is 319699. The next prime is 319727. The reversal of 319720 is 27913.

It can be written as a sum of positive squares in 2 ways, for example, as 289444 + 30276 = 538^2 + 174^2 .

It is a junction number, because it is equal to n+sod(n) for n = 319691 and 319700.

It is not an unprimeable number, because it can be changed into a prime (319727) by changing a digit.

319720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3957 + ... + 4036.

2³¹⁹⁷²⁰ is an apocalyptic number.

It is an amenable number.

319720 is an abundant number, since it is smaller than the sum of its proper divisors (399740).

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

319720 is a wasteful number, since it uses less digits than its factorization.

319720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8004 (or 8000 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 319720 is about 565.4378834143. The cubic root of 319720 is about 68.3790823262.

The spelling of 319720 in words is "three hundred nineteen thousand, seven hundred twenty".