64543488 has 72 divisors (see below), whose sum is σ = 177386496. Its totient is φ = 20812800.

The previous prime is 64543487. The next prime is 64543499. The reversal of 64543488 is 88434546.

It is a super-2 number, since 2×64543488² = 8331723686412288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64543483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22453 + ... + 25163.

Almost surely, 2^64543488 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 64543488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88693248).

64543488 is an abundant number, since it is smaller than the sum of its proper divisors (112843008).

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

64543488 is a wasteful number, since it uses less digits than its factorization.

64543488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761 (or 2747 counting only the distinct ones).

The product of its digits is 368640, while the sum is 42.

The square root of 64543488 is about 8033.8961905168. The cubic root of 64543488 is about 401.1290766329.

The spelling of 64543488 in words is "sixty-four million, five hundred forty-three thousand, four hundred eighty-eight".