518801990 has 16 divisors (see below), whose sum is σ = 1067249952. Its totient is φ = 177874944.

The previous prime is 518801891. The next prime is 518801999. The reversal of 518801990 is 99108815.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518801999) 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, 3705659 + ... + 3705798.

It is an arithmetic number, because the mean of its divisors is an integer number (66703122).

Almost surely, 2^518801990 is an apocalyptic number.

518801990 is an abundant number, since it is smaller than the sum of its proper divisors (548447962).

518801990 is a wasteful number, since it uses less digits than its factorization.

518801990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7411471.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 518801990 is about 22777.2252480411. The cubic root of 518801990 is about 803.5271294681.

The spelling of 518801990 in words is "five hundred eighteen million, eight hundred one thousand, nine hundred ninety".