64043560 has 64 divisors (see below), whose sum is σ = 166072320. Its totient is φ = 21772800.

The previous prime is 64043537. The next prime is 64043561. The reversal of 64043560 is 6534046.

It is a super-5 number, since 5×64043560⁵ (a number of 40 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (64043561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34660 + ... + 36460.

It is an arithmetic number, because the mean of its divisors is an integer number (2594880).

Almost surely, 2^64043560 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 64043560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83036160).

64043560 is an abundant number, since it is smaller than the sum of its proper divisors (102028760).

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

64043560 is a wasteful number, since it uses less digits than its factorization.

64043560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946 (or 1942 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 64043560 is about 8002.7220369072. The cubic root of 64043560 is about 400.0907294189.

It can be divided in two parts, 640 and 43560, that multiplied together give a square (27878400 = 5280²).

The spelling of 64043560 in words is "sixty-four million, forty-three thousand, five hundred sixty".