381290 has 32 divisors (see below), whose sum is σ = 846720. Its totient is φ = 120384.

The previous prime is 381289. The next prime is 381301. The reversal of 381290 is 92183.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701 + ... + 1119.

It is an arithmetic number, because the mean of its divisors is an integer number (26460).

2³⁸¹²⁹⁰ is an apocalyptic number.

381290 is an abundant number, since it is smaller than the sum of its proper divisors (465430).

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

381290 is a wasteful number, since it uses less digits than its factorization.

381290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 381290 is about 617.4868419651. The cubic root of 381290 is about 72.5134338959.

The spelling of 381290 in words is "three hundred eighty-one thousand, two hundred ninety".