240664 has 16 divisors (see below), whose sum is σ = 459000. Its totient is φ = 118272.

The previous prime is 240659. The next prime is 240677. The reversal of 240664 is 466042.

It is a congruent number.

It is an unprimeable number.

240664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312 + ... + 760.

2²⁴⁰⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

240664 is a deficient number, since it is larger than the sum of its proper divisors (218336).

240664 is a wasteful number, since it uses less digits than its factorization.

240664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 240664 is about 490.5751726290. The cubic root of 240664 is about 62.2019085239.

The spelling of 240664 in words is "two hundred forty thousand, six hundred sixty-four".