518649340 has 48 divisors (see below), whose sum is σ = 1229165280. Its totient is φ = 182094080.

The previous prime is 518649323. The next prime is 518649347. The reversal of 518649340 is 43946815.

It is a junction number, because it is equal to n+sod(n) for n = 518649293 and 518649302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518649347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34267 + ... + 47026.

It is an arithmetic number, because the mean of its divisors is an integer number (25607610).

Almost surely, 2^518649340 is an apocalyptic number.

It is an amenable number.

518649340 is an abundant number, since it is smaller than the sum of its proper divisors (710515940).

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

518649340 is a wasteful number, since it uses less digits than its factorization.

518649340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81342 (or 81340 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 518649340 is about 22773.8740665702. The cubic root of 518649340 is about 803.4483129827.

The spelling of 518649340 in words is "five hundred eighteen million, six hundred forty-nine thousand, three hundred forty".