390850 has 12 divisors (see below), whose sum is σ = 727074. Its totient is φ = 156320.

The previous prime is 390829. The next prime is 390851. The reversal of 390850 is 58093.

It can be written as a sum of positive squares in 3 ways, for example, as 149769 + 241081 = 387^2 + 491^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (390851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3859 + ... + 3958.

2³⁹⁰⁸⁵⁰ is an apocalyptic number.

390850 is a deficient number, since it is larger than the sum of its proper divisors (336224).

390850 is a wasteful number, since it uses less digits than its factorization.

390850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7829 (or 7824 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 390850 is about 625.1799740875. The cubic root of 390850 is about 73.1144760466.

The spelling of 390850 in words is "three hundred ninety thousand, eight hundred fifty".