509118940 has 24 divisors (see below), whose sum is σ = 1166345712. Its totient is φ = 185134080.

The previous prime is 509118937. The next prime is 509118943. The reversal of 509118940 is 49811905.

It is an interprime number because it is at equal distance from previous prime (509118937) and next prime (509118943).

It is a self number, because there is not a number n which added to its sum of digits gives 509118940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509118943) 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, 1156869 + ... + 1157308.

It is an arithmetic number, because the mean of its divisors is an integer number (48597738).

Almost surely, 2^509118940 is an apocalyptic number.

It is an amenable number.

509118940 is an abundant number, since it is smaller than the sum of its proper divisors (657226772).

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

509118940 is a wasteful number, since it uses less digits than its factorization.

509118940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314197 (or 2314195 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 509118940 is about 22563.6641527922. The cubic root of 509118940 is about 798.4966245141.

The spelling of 509118940 in words is "five hundred nine million, one hundred eighteen thousand, nine hundred forty".