240664536 has 96 divisors (see below), whose sum is σ = 756138240. Its totient is φ = 67725504.

The previous prime is 240664519. The next prime is 240664549. The reversal of 240664536 is 635466042.

240664536 is a `hidden beast` number, since 2 + 4 + 0 + 6 + 645 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 240664536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30205 + ... + 37331.

It is an arithmetic number, because the mean of its divisors is an integer number (7876440).

Almost surely, 2^240664536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 240664536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378069120).

240664536 is an abundant number, since it is smaller than the sum of its proper divisors (515473704).

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

240664536 is a wasteful number, since it uses less digits than its factorization.

240664536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7213 (or 7206 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 240664536 is about 15513.3663658150. The cubic root of 240664536 is about 622.0195470193.

The spelling of 240664536 in words is "two hundred forty million, six hundred sixty-four thousand, five hundred thirty-six".