513987940 has 24 divisors (see below), whose sum is σ = 1097671680. Its totient is φ = 202110048.

The previous prime is 513987937. The next prime is 513987949. The reversal of 513987940 is 49789315.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (513987949) 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, 216612 + ... + 218971.

It is an arithmetic number, because the mean of its divisors is an integer number (45736320).

Almost surely, 2^513987940 is an apocalyptic number.

It is an amenable number.

513987940 is an abundant number, since it is smaller than the sum of its proper divisors (583683740).

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

513987940 is a wasteful number, since it uses less digits than its factorization.

513987940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435651 (or 435649 counting only the distinct ones).

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

The square root of 513987940 is about 22671.3021240510. The cubic root of 513987940 is about 801.0340482710.

The spelling of 513987940 in words is "five hundred thirteen million, nine hundred eighty-seven thousand, nine hundred forty".