290381 has 8 divisors (see below), whose sum is σ = 357504. Its totient is φ = 229680.

The previous prime is 290369. The next prime is 290383. The reversal of 290381 is 183092.

290381 is nontrivially palindromic in base 14.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 290381 - 2⁶ = 290317 is a prime.

It is a super-2 number, since 2×290381² = 168642250322, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 290381.

It is not an unprimeable number, because it can be changed into a prime (290383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1505 + ... + 1686.

It is an arithmetic number, because the mean of its divisors is an integer number (44688).

2²⁹⁰³⁸¹ is an apocalyptic number.

It is an amenable number.

290381 is a deficient number, since it is larger than the sum of its proper divisors (67123).

290381 is a wasteful number, since it uses less digits than its factorization.

290381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211.

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

The square root of 290381 is about 538.8701142205. The cubic root of 290381 is about 66.2200339143.

The spelling of 290381 in words is "two hundred ninety thousand, three hundred eighty-one".