390618 has 12 divisors (see below), whose sum is σ = 846378. Its totient is φ = 130200.

The previous prime is 390581. The next prime is 390647. The reversal of 390618 is 816093.

It can be written as a sum of positive squares in only one way, i.e., 263169 + 127449 = 513^2 + 357^2 .

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 390591 and 390600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10833 + ... + 10868.

2³⁹⁰⁶¹⁸ is an apocalyptic number.

390618 is an abundant number, since it is smaller than the sum of its proper divisors (455760).

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

390618 is a wasteful number, since it uses less digits than its factorization.

390618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21709 (or 21706 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 390618 is about 624.9943999749. The cubic root of 390618 is about 73.1000067994.

The spelling of 390618 in words is "three hundred ninety thousand, six hundred eighteen".