518222380 has 24 divisors (see below), whose sum is σ = 1171980432. Its totient is φ = 191343552.

The previous prime is 518222377. The next prime is 518222399. The reversal of 518222380 is 83222815.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996322 + ... + 996841.

It is an arithmetic number, because the mean of its divisors is an integer number (48832518).

Almost surely, 2^518222380 is an apocalyptic number.

It is an amenable number.

518222380 is an abundant number, since it is smaller than the sum of its proper divisors (653758052).

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

518222380 is a wasteful number, since it uses less digits than its factorization.

518222380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993185 (or 1993183 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 518222380 is about 22764.4982373871. The cubic root of 518222380 is about 803.2277821794.

The spelling of 518222380 in words is "five hundred eighteen million, two hundred twenty-two thousand, three hundred eighty".