1938813418 has 8 divisors (see below), whose sum is σ = 2945033280. Its totient is φ = 957135660.

The previous prime is 1938813391. The next prime is 1938813421. The reversal of 1938813418 is 8143188391.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6135328 + ... + 6135643.

It is an arithmetic number, because the mean of its divisors is an integer number (368129160).

Almost surely, 2^1938813418 is an apocalyptic number.

1938813418 is a deficient number, since it is larger than the sum of its proper divisors (1006219862).

1938813418 is a wasteful number, since it uses less digits than its factorization.

1938813418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12271052.

The product of its digits is 165888, while the sum is 46.

The square root of 1938813418 is about 44031.9590524882. The cubic root of 1938813418 is about 1246.9393746811.

The spelling of 1938813418 in words is "one billion, nine hundred thirty-eight million, eight hundred thirteen thousand, four hundred eighteen".