240904 has 8 divisors (see below), whose sum is σ = 451710. Its totient is φ = 120448.

The previous prime is 240899. The next prime is 240913. The reversal of 240904 is 409042.

It can be written as a sum of positive squares in only one way, i.e., 152100 + 88804 = 390^2 + 298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15049 + ... + 15064.

2²⁴⁰⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

240904 is a deficient number, since it is larger than the sum of its proper divisors (210806).

240904 is a wasteful number, since it uses less digits than its factorization.

240904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30119 (or 30115 counting only the distinct ones).

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

The square root of 240904 is about 490.8197225051. The cubic root of 240904 is about 62.2225784182. Note that the first 3 decimals are identical.

Adding to 240904 its reverse (409042), we get a palindrome (649946).

The spelling of 240904 in words is "two hundred forty thousand, nine hundred four".