390382391 has 8 divisors (see below), whose sum is σ = 451164960. Its totient is φ = 330853248.

The previous prime is 390382387. The next prime is 390382397. The reversal of 390382391 is 193283093.

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 390382391 - 2² = 390382387 is a prime.

It is a super-2 number, since 2×390382391² = 304796822405753762, 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 (390382397) 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, 312686 + ... + 313931.

It is an arithmetic number, because the mean of its divisors is an integer number (56395620).

Almost surely, 2^390382391 is an apocalyptic number.

390382391 is a deficient number, since it is larger than the sum of its proper divisors (60782569).

390382391 is an equidigital number, since it uses as much as digits as its factorization.

390382391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626713.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 390382391 is about 19758.0968466095. The cubic root of 390382391 is about 730.8530660341.

The spelling of 390382391 in words is "three hundred ninety million, three hundred eighty-two thousand, three hundred ninety-one".