390465893 has 8 divisors (see below), whose sum is σ = 401701248. Its totient is φ = 379373904.

The previous prime is 390465869. The next prime is 390465949. The reversal of 390465893 is 398564093.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390465893 is a prime.

It is a super-2 number, since 2×390465893² = 304927227192574898, 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 (390465853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30305 + ... + 41222.

It is an arithmetic number, because the mean of its divisors is an integer number (50212656).

Almost surely, 2^390465893 is an apocalyptic number.

It is an amenable number.

390465893 is a deficient number, since it is larger than the sum of its proper divisors (11235355).

390465893 is a wasteful number, since it uses less digits than its factorization.

390465893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71683.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 390465893 is about 19760.2098420032. The cubic root of 390465893 is about 730.9051716477.

The spelling of 390465893 in words is "three hundred ninety million, four hundred sixty-five thousand, eight hundred ninety-three".