512247420 has 72 divisors (see below), whose sum is σ = 1557148320. Its totient is φ = 136306560.

The previous prime is 512247409. The next prime is 512247469. The reversal of 512247420 is 24742215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88825 + ... + 94415.

It is an arithmetic number, because the mean of its divisors is an integer number (21627060).

Almost surely, 2^512247420 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 512247420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778574160).

512247420 is an abundant number, since it is smaller than the sum of its proper divisors (1044900900).

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

512247420 is a wasteful number, since it uses less digits than its factorization.

512247420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6115 (or 6110 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 512247420 is about 22632.8835988700. The cubic root of 512247420 is about 800.1288438313.

Adding to 512247420 its reverse (24742215), we get a palindrome (536989635).

The spelling of 512247420 in words is "five hundred twelve million, two hundred forty-seven thousand, four hundred twenty".