390990293 has 8 divisors (see below), whose sum is σ = 414294912. Its totient is φ = 367719616.

The previous prime is 390990289. The next prime is 390990307. The reversal of 390990293 is 392099093.

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 390990293 - 2² = 390990289 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390990203) 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, 17546 + ... + 33012.

It is an arithmetic number, because the mean of its divisors is an integer number (51786864).

Almost surely, 2^390990293 is an apocalyptic number.

It is an amenable number.

390990293 is a deficient number, since it is larger than the sum of its proper divisors (23304619).

390990293 is a wasteful number, since it uses less digits than its factorization.

390990293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16971.

The product of its (nonzero) digits is 118098, while the sum is 44.

The square root of 390990293 is about 19773.4744797165. The cubic root of 390990293 is about 731.2322298455.

The spelling of 390990293 in words is "three hundred ninety million, nine hundred ninety thousand, two hundred ninety-three".