64633344 has 80 divisors (see below), whose sum is σ = 178247520. Its totient is φ = 20787200.

The previous prime is 64633333. The next prime is 64633367. The reversal of 64633344 is 44333646.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43819 + ... + 45269.

It is an arithmetic number, because the mean of its divisors is an integer number (2228094).

Almost surely, 2^64633344 is an apocalyptic number.

64633344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64633344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89123760).

64633344 is an abundant number, since it is smaller than the sum of its proper divisors (113614176).

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

64633344 is a wasteful number, since it uses less digits than its factorization.

64633344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501 (or 1485 counting only the distinct ones).

The product of its digits is 62208, while the sum is 33.

The square root of 64633344 is about 8039.4865507693. The cubic root of 64633344 is about 401.3151379582.

The spelling of 64633344 in words is "sixty-four million, six hundred thirty-three thousand, three hundred forty-four".