512421768 has 64 divisors (see below), whose sum is σ = 1443484800. Its totient is φ = 168396480.

The previous prime is 512421757. The next prime is 512421787. The reversal of 512421768 is 867124215.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1371 + ... + 32042.

It is an arithmetic number, because the mean of its divisors is an integer number (22554450).

Almost surely, 2^512421768 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 512421768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (721742400).

512421768 is an abundant number, since it is smaller than the sum of its proper divisors (931063032).

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

512421768 is a wasteful number, since it uses less digits than its factorization.

512421768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33499 (or 33489 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 512421768 is about 22636.7349235706. The cubic root of 512421768 is about 800.2196105418.

The spelling of 512421768 in words is "five hundred twelve million, four hundred twenty-one thousand, seven hundred sixty-eight".