518491898 has 16 divisors (see below), whose sum is σ = 826868736. Its totient is φ = 243294480.

The previous prime is 518491859. The next prime is 518491901. The reversal of 518491898 is 898194815.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Curzon number.

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, 103898 + ... + 108773.

It is an arithmetic number, because the mean of its divisors is an integer number (51679296).

Almost surely, 2^518491898 is an apocalyptic number.

518491898 is a deficient number, since it is larger than the sum of its proper divisors (308376838).

518491898 is a wasteful number, since it uses less digits than its factorization.

518491898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212749.

The product of its digits is 829440, while the sum is 53.

The square root of 518491898 is about 22770.4171678957. The cubic root of 518491898 is about 803.3670060819.

The spelling of 518491898 in words is "five hundred eighteen million, four hundred ninety-one thousand, eight hundred ninety-eight".