381390 has 16 divisors (see below), whose sum is σ = 915408. Its totient is φ = 101696.

The previous prime is 381389. The next prime is 381401. The reversal of 381390 is 93183.

381390 is nontrivially palindromic in base 9.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 381390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6327 + ... + 6386.

It is an arithmetic number, because the mean of its divisors is an integer number (57213).

2³⁸¹³⁹⁰ is an apocalyptic number.

381390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381390 is an abundant number, since it is smaller than the sum of its proper divisors (534018).

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

381390 is a wasteful number, since it uses less digits than its factorization.

381390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12723.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 381390 is about 617.5678100419. The cubic root of 381390 is about 72.5197726490.

The spelling of 381390 in words is "three hundred eighty-one thousand, three hundred ninety".