1889331386 has 16 divisors (see below), whose sum is σ = 3039444000. Its totient is φ = 878059728.

The previous prime is 1889331361. The next prime is 1889331391. The reversal of 1889331386 is 6831339881.

It is a happy number.

It is a super-2 number, since 2×1889331386² = 7139146172249361992, which contains 22 as substring.

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, 467036 + ... + 471063.

It is an arithmetic number, because the mean of its divisors is an integer number (189965250).

Almost surely, 2^1889331386 is an apocalyptic number.

1889331386 is a deficient number, since it is larger than the sum of its proper divisors (1150112614).

1889331386 is a wasteful number, since it uses less digits than its factorization.

1889331386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938173.

The product of its digits is 746496, while the sum is 50.

The square root of 1889331386 is about 43466.4397667902. The cubic root of 1889331386 is about 1236.2397765007.

The spelling of 1889331386 in words is "one billion, eight hundred eighty-nine million, three hundred thirty-one thousand, three hundred eighty-six".