1839138686 has 16 divisors (see below), whose sum is σ = 3439428480. Its totient is φ = 716547480.

The previous prime is 1839138683. The next prime is 1839138701. The reversal of 1839138686 is 6868319381.

It is a happy number.

It is a super-2 number, since 2×1839138686² = 6764862212683613192, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1839138683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5971076 + ... + 5971383.

It is an arithmetic number, because the mean of its divisors is an integer number (214964280).

Almost surely, 2^1839138686 is an apocalyptic number.

1839138686 is a deficient number, since it is larger than the sum of its proper divisors (1600289794).

1839138686 is a wasteful number, since it uses less digits than its factorization.

1839138686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11942479.

The product of its digits is 1492992, while the sum is 53.

The square root of 1839138686 is about 42885.1802607847. The cubic root of 1839138686 is about 1225.1939020564.

The spelling of 1839138686 in words is "one billion, eight hundred thirty-nine million, one hundred thirty-eight thousand, six hundred eighty-six".