390181 has 8 divisors (see below), whose sum is σ = 432000. Its totient is φ = 349440.

The previous prime is 390161. The next prime is 390191. The reversal of 390181 is 181093.

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 390181 - 2¹¹ = 388133 is a prime.

It is a super-2 number, since 2×390181² = 304482425522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390101) 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, 645 + ... + 1093.

It is an arithmetic number, because the mean of its divisors is an integer number (54000).

2³⁹⁰¹⁸¹ is an apocalyptic number.

It is an amenable number.

390181 is a deficient number, since it is larger than the sum of its proper divisors (41819).

390181 is a wasteful number, since it uses less digits than its factorization.

390181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 390181 is about 624.6446990090. The cubic root of 390181 is about 73.0727366591.

The spelling of 390181 in words is "three hundred ninety thousand, one hundred eighty-one".