1838190920 has 16 divisors (see below), whose sum is σ = 4135929660. Its totient is φ = 735276352.

The previous prime is 1838190901. The next prime is 1838190979. The reversal of 1838190920 is 290918381.

It can be written as a sum of positive squares in 2 ways, for example, as 1767193444 + 70997476 = 42038^2 + 8426^2 .

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, 22977347 + ... + 22977426.

Almost surely, 2^1838190920 is an apocalyptic number.

1838190920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1838190920 is an abundant number, since it is smaller than the sum of its proper divisors (2297738740).

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

1838190920 is a wasteful number, since it uses less digits than its factorization.

1838190920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45954784 (or 45954780 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1838190920 is about 42874.1287958134. The cubic root of 1838190920 is about 1224.9834055783.

The spelling of 1838190920 in words is "one billion, eight hundred thirty-eight million, one hundred ninety thousand, nine hundred twenty".