512243440 has 40 divisors (see below), whose sum is σ = 1191919248. Its totient is φ = 204733440.

The previous prime is 512243437. The next prime is 512243441. The reversal of 512243440 is 44342215.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512243441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171399 + ... + 174361.

Almost surely, 2^512243440 is an apocalyptic number.

It is an amenable number.

512243440 is an abundant number, since it is smaller than the sum of its proper divisors (679675808).

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

512243440 is a wasteful number, since it uses less digits than its factorization.

512243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137 (or 5131 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 512243440 is about 22632.7956735353. The cubic root of 512243440 is about 800.1267715768.

Adding to 512243440 its reverse (44342215), we get a palindrome (556585655).

The spelling of 512243440 in words is "five hundred twelve million, two hundred forty-three thousand, four hundred forty".