390740 has 24 divisors (see below), whose sum is σ = 938112. Its totient is φ = 133920.

The previous prime is 390739. The next prime is 390743. The reversal of 390740 is 47093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390743) 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 7 ways as a sum of consecutive naturals, for example, 1256 + ... + 1535.

It is an arithmetic number, because the mean of its divisors is an integer number (39088).

2³⁹⁰⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

390740 is an abundant number, since it is smaller than the sum of its proper divisors (547372).

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

390740 is a wasteful number, since it uses less digits than its factorization.

390740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807 (or 2805 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 390740 is about 625.0919932298. The cubic root of 390740 is about 73.1076163417.

The spelling of 390740 in words is "three hundred ninety thousand, seven hundred forty".