509198956 has 12 divisors (see below), whose sum is σ = 1018397968. Its totient is φ = 218228112.

The previous prime is 509198953. The next prime is 509198981. The reversal of 509198956 is 659891905.

509198956 is an admirable number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (509198951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9092811 + ... + 9092866.

Almost surely, 2^509198956 is an apocalyptic number.

It is an amenable number.

509198956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

509198956 is a wasteful number, since it uses less digits than its factorization.

509198956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18185688 (or 18185686 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 52.

The square root of 509198956 is about 22565.4371993986. The cubic root of 509198956 is about 798.5384543983.

The spelling of 509198956 in words is "five hundred nine million, one hundred ninety-eight thousand, nine hundred fifty-six".