390955946 has 4 divisors (see below), whose sum is σ = 586433922. Its totient is φ = 195477972.

The previous prime is 390955937. The next prime is 390955963. The reversal of 390955946 is 649559093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 382632721 + 8323225 = 19561^2 + 2885^2 .

It is a junction number, because it is equal to n+sod(n) for n = 390955894 and 390955903.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97738985 + ... + 97738988.

Almost surely, 2^390955946 is an apocalyptic number.

390955946 is a deficient number, since it is larger than the sum of its proper divisors (195477976).

390955946 is a wasteful number, since it uses less digits than its factorization.

390955946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195477975.

The product of its (nonzero) digits is 1312200, while the sum is 50.

The square root of 390955946 is about 19772.6059486351. The cubic root of 390955946 is about 731.2108172348.

The spelling of 390955946 in words is "three hundred ninety million, nine hundred fifty-five thousand, nine hundred forty-six".