513789940 has 12 divisors (see below), whose sum is σ = 1078958916. Its totient is φ = 205515968.

The previous prime is 513789917. The next prime is 513789943. The reversal of 513789940 is 49987315.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 83393424 + 430396516 = 9132^2 + 20746^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513789943) 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, 12844729 + ... + 12844768.

It is an arithmetic number, because the mean of its divisors is an integer number (89913243).

Almost surely, 2^513789940 is an apocalyptic number.

It is an amenable number.

513789940 is an abundant number, since it is smaller than the sum of its proper divisors (565168976).

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

513789940 is a wasteful number, since it uses less digits than its factorization.

513789940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25689506 (or 25689504 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 513789940 is about 22666.9349493927. The cubic root of 513789940 is about 800.9311761349.

The spelling of 513789940 in words is "five hundred thirteen million, seven hundred eighty-nine thousand, nine hundred forty".