64886720 has 84 divisors (see below), whose sum is σ = 160413192. Its totient is φ = 24998400.

The previous prime is 64886693. The next prime is 64886741. The reversal of 64886720 is 2768846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307415 + ... + 307625.

Almost surely, 2^64886720 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 64886720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80206596).

64886720 is an abundant number, since it is smaller than the sum of its proper divisors (95526472).

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

64886720 is a wasteful number, since it uses less digits than its factorization.

64886720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 64886720 is about 8055.2293573802. The cubic root of 64886720 is about 401.8388668014.

The spelling of 64886720 in words is "sixty-four million, eight hundred eighty-six thousand, seven hundred twenty".