390668593 has 16 divisors (see below), whose sum is σ = 469472256. Its totient is φ = 317837520.

The previous prime is 390668591. The next prime is 390668617. The reversal of 390668593 is 395866093.

It is not a de Polignac number, because 390668593 - 2¹ = 390668591 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390668591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11830 + ... + 30352.

It is an arithmetic number, because the mean of its divisors is an integer number (29342016).

Almost surely, 2^390668593 is an apocalyptic number.

It is an amenable number.

390668593 is a deficient number, since it is larger than the sum of its proper divisors (78803663).

390668593 is a wasteful number, since it uses less digits than its factorization.

390668593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18684.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 390668593 is about 19765.3381706461. The cubic root of 390668593 is about 731.0316264388.

The spelling of 390668593 in words is "three hundred ninety million, six hundred sixty-eight thousand, five hundred ninety-three".