509906028 has 24 divisors (see below), whose sum is σ = 1221938032. Its totient is φ = 165374784.

The previous prime is 509906027. The next prime is 509906069. The reversal of 509906028 is 820609905.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (509906027) 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, 573775 + ... + 574662.

Almost surely, 2^509906028 is an apocalyptic number.

It is an amenable number.

509906028 is an abundant number, since it is smaller than the sum of its proper divisors (712032004).

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

509906028 is a wasteful number, since it uses less digits than its factorization.

509906028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148481 (or 1148479 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 509906028 is about 22581.0989103719. The cubic root of 509906028 is about 798.9078994071.

The spelling of 509906028 in words is "five hundred nine million, nine hundred six thousand, twenty-eight".