390680 has 16 divisors (see below), whose sum is σ = 879120. Its totient is φ = 156256.

The previous prime is 390673. The next prime is 390703. The reversal of 390680 is 86093.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

390680 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4844 + ... + 4923.

It is an arithmetic number, because the mean of its divisors is an integer number (54945).

2³⁹⁰⁶⁸⁰ is an apocalyptic number.

It is an amenable number.

390680 is an abundant number, since it is smaller than the sum of its proper divisors (488440).

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

390680 is a wasteful number, since it uses less digits than its factorization.

390680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9778 (or 9774 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 390680 is about 625.0439984513. The cubic root of 390680 is about 73.1038741418.

The spelling of 390680 in words is "three hundred ninety thousand, six hundred eighty".