64433320 has 64 divisors (see below), whose sum is σ = 166406400. Its totient is φ = 21995520.

The previous prime is 64433261. The next prime is 64433321. The reversal of 64433320 is 2333446.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (64433321) 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, 100200 + ... + 100840.

It is an arithmetic number, because the mean of its divisors is an integer number (2600100).

Almost surely, 2^64433320 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 64433320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83203200).

64433320 is an abundant number, since it is smaller than the sum of its proper divisors (101973080).

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

64433320 is a wasteful number, since it uses less digits than its factorization.

64433320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 64433320 is about 8027.0368131708. The cubic root of 64433320 is about 400.9007202352.

Adding to 64433320 its reverse (2333446), we get a palindrome (66766766).

The spelling of 64433320 in words is "sixty-four million, four hundred thirty-three thousand, three hundred twenty".