390490 has 16 divisors (see below), whose sum is σ = 744552. Its totient is φ = 146944.

The previous prime is 390487. The next prime is 390491. The reversal of 390490 is 94093.

It can be written as a sum of positive squares in 4 ways, for example, as 349281 + 41209 = 591^2 + 203^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (390491) 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, 979 + ... + 1318.

2³⁹⁰⁴⁹⁰ is an apocalyptic number.

390490 is a deficient number, since it is larger than the sum of its proper divisors (354062).

390490 is a wasteful number, since it uses less digits than its factorization.

390490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 390490 is about 624.8919906672. The cubic root of 390490 is about 73.0920213139.

The spelling of 390490 in words is "three hundred ninety thousand, four hundred ninety".