390994 has 4 divisors (see below), whose sum is σ = 586494. Its totient is φ = 195496.

The previous prime is 390991. The next prime is 391009. The reversal of 390994 is 499093.

390994 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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., 378225 + 12769 = 615^2 + 113^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (390991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97747 + ... + 97750.

2³⁹⁰⁹⁹⁴ is an apocalyptic number.

390994 is a deficient number, since it is larger than the sum of its proper divisors (195500).

390994 is a wasteful number, since it uses less digits than its factorization.

390994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195499.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 390994 is about 625.2951303185. The cubic root of 390994 is about 73.1234540789.

The spelling of 390994 in words is "three hundred ninety thousand, nine hundred ninety-four".