390940 has 24 divisors (see below), whose sum is σ = 896112. Its totient is φ = 142080.

The previous prime is 390893. The next prime is 390953. The reversal of 390940 is 49093.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669 + ... + 1108.

It is an arithmetic number, because the mean of its divisors is an integer number (37338).

2³⁹⁰⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

390940 is an abundant number, since it is smaller than the sum of its proper divisors (505172).

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

390940 is a wasteful number, since it uses less digits than its factorization.

390940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1795 counting only the distinct ones).

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

The square root of 390940 is about 625.2519492173. The cubic root of 390940 is about 73.1200875751.

The spelling of 390940 in words is "three hundred ninety thousand, nine hundred forty".