518145390 has 256 divisors, whose sum is σ = 1703116800. Its totient is φ = 109454976.

The previous prime is 518145347. The next prime is 518145391. The reversal of 518145390 is 93541815.

518145390 is a `hidden beast` number, since 518 + 1 + 4 + 53 + 90 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518145391) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1687617 + ... + 1687923.

It is an arithmetic number, because the mean of its divisors is an integer number (6652800).

Almost surely, 2^518145390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 518145390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851558400).

518145390 is an abundant number, since it is smaller than the sum of its proper divisors (1184971410).

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

518145390 is a wasteful number, since it uses less digits than its factorization.

518145390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 518145390 is about 22762.8071643196. The cubic root of 518145390 is about 803.1880028799.

The spelling of 518145390 in words is "five hundred eighteen million, one hundred forty-five thousand, three hundred ninety".