390854217 has 16 divisors (see below), whose sum is σ = 561585920. Its totient is φ = 240371712.

The previous prime is 390854213. The next prime is 390854227. The reversal of 390854217 is 712458093.

It is not a de Polignac number, because 390854217 - 2² = 390854213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390854213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103008 + ... + 106734.

It is an arithmetic number, because the mean of its divisors is an integer number (35099120).

Almost surely, 2^390854217 is an apocalyptic number.

It is an amenable number.

390854217 is a deficient number, since it is larger than the sum of its proper divisors (170731703).

390854217 is a wasteful number, since it uses less digits than its factorization.

390854217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6432.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 390854217 is about 19770.0333080144. The cubic root of 390854217 is about 731.1473899708.

The spelling of 390854217 in words is "three hundred ninety million, eight hundred fifty-four thousand, two hundred seventeen".