64243700 has 36 divisors (see below), whose sum is σ = 144222540. Its totient is φ = 24810240.

The previous prime is 64243691. The next prime is 64243703. The reversal of 64243700 is 734246.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 9897316 + 54346384 = 3146^2 + 7372^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64243700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64243703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8177 + ... + 13976.

Almost surely, 2^64243700 is an apocalyptic number.

It is an amenable number.

64243700 is an abundant number, since it is smaller than the sum of its proper divisors (79978840).

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

64243700 is a wasteful number, since it uses less digits than its factorization.

64243700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22196 (or 22189 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 64243700 is about 8015.2167781040. The cubic root of 64243700 is about 400.5070652737.

Adding to 64243700 its reverse (734246), we get a palindrome (64977946).

The spelling of 64243700 in words is "sixty-four million, two hundred forty-three thousand, seven hundred".