64446500 has 48 divisors (see below), whose sum is σ = 143126256. Its totient is φ = 25344000.

The previous prime is 64446493. The next prime is 64446511. The reversal of 64446500 is 564446.

It can be written as a sum of positive squares in 8 ways, for example, as 59320804 + 5125696 = 7702^2 + 2264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29444 + ... + 31556.

It is an arithmetic number, because the mean of its divisors is an integer number (2981797).

Almost surely, 2^64446500 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 64446500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71563128).

64446500 is an abundant number, since it is smaller than the sum of its proper divisors (78679756).

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

64446500 is a wasteful number, since it uses less digits than its factorization.

64446500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193 (or 2181 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 64446500 is about 8027.8577466221. The cubic root of 64446500 is about 400.9280534600.

It can be divided in two parts, 64446 and 500, that added together give a palindrome (64946).

The spelling of 64446500 in words is "sixty-four million, four hundred forty-six thousand, five hundred".