512728730 has 8 divisors (see below), whose sum is σ = 922911732. Its totient is φ = 205091488.

The previous prime is 512728717. The next prime is 512728751. The reversal of 512728730 is 37827215.

It can be written as a sum of positive squares in 2 ways, for example, as 464273209 + 48455521 = 21547^2 + 6961^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25636427 + ... + 25636446.

Almost surely, 2^512728730 is an apocalyptic number.

512728730 is a deficient number, since it is larger than the sum of its proper divisors (410183002).

512728730 is a wasteful number, since it uses less digits than its factorization.

512728730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51272880.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 512728730 is about 22643.5140824034. The cubic root of 512728730 is about 800.3793669475.

The spelling of 512728730 in words is "five hundred twelve million, seven hundred twenty-eight thousand, seven hundred thirty".