64344432 has 80 divisors (see below), whose sum is σ = 174988800. Its totient is φ = 20334336.

The previous prime is 64344403. The next prime is 64344433. The reversal of 64344432 is 23444346.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 64344432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64344433) 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, 184194 + ... + 184542.

It is an arithmetic number, because the mean of its divisors is an integer number (2187360).

Almost surely, 2^64344432 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 64344432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87494400).

64344432 is an abundant number, since it is smaller than the sum of its proper divisors (110644368).

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

64344432 is a wasteful number, since it uses less digits than its factorization.

64344432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 544 counting only the distinct ones).

The product of its digits is 27648, while the sum is 30.

The square root of 64344432 is about 8021.4981144422. The cubic root of 64344432 is about 400.7162832468.

Adding to 64344432 its reverse (23444346), we get a palindrome (87788778).

The spelling of 64344432 in words is "sixty-four million, three hundred forty-four thousand, four hundred thirty-two".