64243400 has 48 divisors (see below), whose sum is σ = 160862100. Its totient is φ = 23719680.

The previous prime is 64243379. The next prime is 64243441. The reversal of 64243400 is 434246.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 16826404 + 47416996 = 4102^2 + 6886^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9755 + ... + 14954.

Almost surely, 2^64243400 is an apocalyptic number.

It is an amenable number.

64243400 is an abundant number, since it is smaller than the sum of its proper divisors (96618700).

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

64243400 is a wasteful number, since it uses less digits than its factorization.

64243400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24738 (or 24729 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 64243400 is about 8015.1980636788. The cubic root of 64243400 is about 400.5064418543.

Adding to 64243400 its reverse (434246), we get a palindrome (64677646).

The spelling of 64243400 in words is "sixty-four million, two hundred forty-three thousand, four hundred".