390952278 has 16 divisors (see below), whose sum is σ = 868782960. Its totient is φ = 130317408.

The previous prime is 390952241. The next prime is 390952283. The reversal of 390952278 is 872259093.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3619875 + ... + 3619982.

It is an arithmetic number, because the mean of its divisors is an integer number (54298935).

Almost surely, 2^390952278 is an apocalyptic number.

390952278 is an abundant number, since it is smaller than the sum of its proper divisors (477830682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390952278 is a wasteful number, since it uses less digits than its factorization.

390952278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7239868 (or 7239862 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 390952278 is about 19772.5131938254. The cubic root of 390952278 is about 731.2085304556.

The spelling of 390952278 in words is "three hundred ninety million, nine hundred fifty-two thousand, two hundred seventy-eight".