240400664 has 24 divisors (see below), whose sum is σ = 524344140. Its totient is φ = 103028688.

The previous prime is 240400663. The next prime is 240400687. The reversal of 240400664 is 466004042.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240400663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 306242 + ... + 307025.

Almost surely, 2^240400664 is an apocalyptic number.

It is an amenable number.

240400664 is an abundant number, since it is smaller than the sum of its proper divisors (283943476).

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

240400664 is a wasteful number, since it uses less digits than its factorization.

240400664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613287 (or 613276 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 240400664 is about 15504.8593673080. The cubic root of 240400664 is about 621.7921300953.

The spelling of 240400664 in words is "two hundred forty million, four hundred thousand, six hundred sixty-four".