390479217 has 8 divisors (see below), whose sum is σ = 524385120. Its totient is φ = 258446400.

The previous prime is 390479213. The next prime is 390479237. The reversal of 390479217 is 712974093.

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

It is not a de Polignac number, because 390479217 - 2² = 390479213 is a prime.

It is a super-3 number, since 3×390479217³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (390479213) 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, 467784 + ... + 468617.

It is an arithmetic number, because the mean of its divisors is an integer number (65548140).

Almost surely, 2^390479217 is an apocalyptic number.

It is an amenable number.

390479217 is a deficient number, since it is larger than the sum of its proper divisors (133905903).

390479217 is a wasteful number, since it uses less digits than its factorization.

390479217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936543.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 390479217 is about 19760.5469812958. The cubic root of 390479217 is about 730.9134851948.

The spelling of 390479217 in words is "three hundred ninety million, four hundred seventy-nine thousand, two hundred seventeen".