390650 has 24 divisors (see below), whose sum is σ = 783804. Its totient is φ = 144000.

The previous prime is 390647. The next prime is 390653. The reversal of 390650 is 56093.

It is an interprime number because it is at equal distance from previous prime (390647) and next prime (390653).

It can be written as a sum of positive squares in 6 ways, for example, as 137641 + 253009 = 371^2 + 503^2 .

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350 + ... + 950.

2³⁹⁰⁶⁵⁰ is an apocalyptic number.

390650 is an abundant number, since it is smaller than the sum of its proper divisors (393154).

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

390650 is a wasteful number, since it uses less digits than its factorization.

390650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 390650 is about 625.0199996800. The cubic root of 390650 is about 73.1020028982.

The spelling of 390650 in words is "three hundred ninety thousand, six hundred fifty".