381320 has 16 divisors (see below), whose sum is σ = 858060. Its totient is φ = 152512.

The previous prime is 381319. The next prime is 381323. The reversal of 381320 is 23183.

381320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

381320 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 357604 + 23716 = 598^2 + 154^2 .

It is not an unprimeable number, because it can be changed into a prime (381323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4727 + ... + 4806.

2³⁸¹³²⁰ is an apocalyptic number.

It is an amenable number.

381320 is an abundant number, since it is smaller than the sum of its proper divisors (476740).

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

381320 is a wasteful number, since it uses less digits than its factorization.

381320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9544 (or 9540 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 381320 is about 617.5111335029. The cubic root of 381320 is about 72.5153356382.

The spelling of 381320 in words is "three hundred eighty-one thousand, three hundred twenty".