240390 has 24 divisors (see below), whose sum is σ = 625248. Its totient is φ = 64080.

The previous prime is 240379. The next prime is 240421. The reversal of 240390 is 93042.

240390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1246 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (26052).

2²⁴⁰³⁹⁰ is an apocalyptic number.

240390 is an abundant number, since it is smaller than the sum of its proper divisors (384858).

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

240390 is a wasteful number, since it uses less digits than its factorization.

240390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684 (or 2681 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 240390 is about 490.2958290665. The cubic root of 240390 is about 62.1782935876.

It can be divided in two parts, 240 and 390, that added together give a triangular number (630 = T₃₅).

The spelling of 240390 in words is "two hundred forty thousand, three hundred ninety".