240490 has 8 divisors (see below), whose sum is σ = 432900. Its totient is φ = 96192.

The previous prime is 240479. The next prime is 240491. The reversal of 240490 is 94042.

It can be written as a sum of positive squares in 2 ways, for example, as 239121 + 1369 = 489^2 + 37^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (240491) 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 3 ways as a sum of consecutive naturals, for example, 12015 + ... + 12034.

2²⁴⁰⁴⁹⁰ is an apocalyptic number.

240490 is a deficient number, since it is larger than the sum of its proper divisors (192410).

240490 is a wasteful number, since it uses less digits than its factorization.

240490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24056.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 240490 is about 490.3977977112. The cubic root of 240490 is about 62.1869142559.

Subtracting from 240490 its sum of digits (19), we obtain a triangular number (240471 = T₆₉₃).

The spelling of 240490 in words is "two hundred forty thousand, four hundred ninety".