64438264 has 32 divisors (see below), whose sum is σ = 133182000. Its totient is φ = 28984320.

The previous prime is 64438237. The next prime is 64438271. The reversal of 64438264 is 46283446.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4762 + ... + 12310.

Almost surely, 2^64438264 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 64438264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66591000).

64438264 is an abundant number, since it is smaller than the sum of its proper divisors (68743736).

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

64438264 is a wasteful number, since it uses less digits than its factorization.

64438264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7663 (or 7659 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The square root of 64438264 is about 8027.3447664841. The cubic root of 64438264 is about 400.9109737421.

It can be divided in two parts, 644382 and 64, that added together give a palindrome (644446).

The spelling of 64438264 in words is "sixty-four million, four hundred thirty-eight thousand, two hundred sixty-four".