390641279 has 6 divisors (see below), whose sum is σ = 454419504. Its totient is φ = 334835340.

The previous prime is 390641267. The next prime is 390641287. The reversal of 390641279 is 972146093.

It is not a de Polignac number, because 390641279 - 2¹² = 390637183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390641879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3986087 + ... + 3986184.

It is an arithmetic number, because the mean of its divisors is an integer number (75736584).

Almost surely, 2^390641279 is an apocalyptic number.

390641279 is a deficient number, since it is larger than the sum of its proper divisors (63778225).

390641279 is an equidigital number, since it uses as much as digits as its factorization.

390641279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7972285 (or 7972278 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 390641279 is about 19764.6472015060. The cubic root of 390641279 is about 731.0145890969.

The spelling of 390641279 in words is "three hundred ninety million, six hundred forty-one thousand, two hundred seventy-nine".