1018718638 has 16 divisors (see below), whose sum is σ = 1764381024. Its totient is φ = 432092160.

The previous prime is 1018718587. The next prime is 1018718647. The reversal of 1018718638 is 8368178101.

It is a junction number, because it is equal to n+sod(n) for n = 1018718594 and 1018718603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373723 + ... + 376438.

It is an arithmetic number, because the mean of its divisors is an integer number (110273814).

Almost surely, 2^1018718638 is an apocalyptic number.

1018718638 is a deficient number, since it is larger than the sum of its proper divisors (745662386).

1018718638 is an equidigital number, since it uses as much as digits as its factorization.

1018718638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750267.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 1018718638 is about 31917.3720409435. The cubic root of 1018718638 is about 1006.2010139444.

The spelling of 1018718638 in words is "one billion, eighteen million, seven hundred eighteen thousand, six hundred thirty-eight".