64346720 has 48 divisors (see below), whose sum is σ = 153407520. Its totient is φ = 25503744.

The previous prime is 64346707. The next prime is 64346747. The reversal of 64346720 is 2764346.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 16301 + ... + 19859.

It is an arithmetic number, because the mean of its divisors is an integer number (3195990).

Almost surely, 2^64346720 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 64346720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76703760).

64346720 is an abundant number, since it is smaller than the sum of its proper divisors (89060800).

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

64346720 is a wasteful number, since it uses less digits than its factorization.

64346720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687 (or 3679 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 64346720 is about 8021.6407299255. The cubic root of 64346720 is about 400.7210328315.

The spelling of 64346720 in words is "sixty-four million, three hundred forty-six thousand, seven hundred twenty".