1838379966 has 64 divisors (see below), whose sum is σ = 3941498880. Its totient is φ = 569623040.

The previous prime is 1838379943. The next prime is 1838379971. The reversal of 1838379966 is 6699738381.

It is a super-2 number, since 2×1838379966² = 6759281798780322312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3837715 + ... + 3838193.

It is an arithmetic number, because the mean of its divisors is an integer number (61585920).

Almost surely, 2^1838379966 is an apocalyptic number.

1838379966 is an abundant number, since it is smaller than the sum of its proper divisors (2103118914).

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

1838379966 is a wasteful number, since it uses less digits than its factorization.

1838379966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889.

The product of its digits is 11757312, while the sum is 60.

The square root of 1838379966 is about 42876.3334020063. Note that the first 3 decimals coincide. The cubic root of 1838379966 is about 1225.0253980018.

The spelling of 1838379966 in words is "one billion, eight hundred thirty-eight million, three hundred seventy-nine thousand, nine hundred sixty-six".