64964240 has 40 divisors (see below), whose sum is σ = 164775168. Its totient is φ = 23623040.

The previous prime is 64964231. The next prime is 64964261. The reversal of 64964240 is 4246946.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 64964240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36032 + ... + 37791.

Almost surely, 2^64964240 is an apocalyptic number.

It is an amenable number.

64964240 is an abundant number, since it is smaller than the sum of its proper divisors (99810928).

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

64964240 is a wasteful number, since it uses less digits than its factorization.

64964240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73847 (or 73841 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 64964240 is about 8060.0397021355. The cubic root of 64964240 is about 401.9988284084.

The spelling of 64964240 in words is "sixty-four million, nine hundred sixty-four thousand, two hundred forty".