64864240 has 60 divisors (see below), whose sum is σ = 175441896. Its totient is φ = 22237824.

The previous prime is 64864201. The next prime is 64864273. The reversal of 64864240 is 4246846.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64864196 and 64864205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4354 + ... + 12193.

Almost surely, 2^64864240 is an apocalyptic number.

It is an amenable number.

64864240 is an abundant number, since it is smaller than the sum of its proper divisors (110577656).

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

64864240 is a wasteful number, since it uses less digits than its factorization.

64864240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16574 (or 16561 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 64864240 is about 8053.8338696549. The cubic root of 64864240 is about 401.7924557580.

The spelling of 64864240 in words is "sixty-four million, eight hundred sixty-four thousand, two hundred forty".