2111789638 has 16 divisors (see below), whose sum is σ = 3621060864. Its totient is φ = 904840200.

The previous prime is 2111789629. The next prime is 2111789639. The reversal of 2111789638 is 8369871112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111789639) 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, 54081 + ... + 84547.

It is an arithmetic number, because the mean of its divisors is an integer number (226316304).

Almost surely, 2^2111789638 is an apocalyptic number.

2111789638 is a deficient number, since it is larger than the sum of its proper divisors (1509271226).

2111789638 is a wasteful number, since it uses less digits than its factorization.

2111789638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35427.

The product of its digits is 145152, while the sum is 46.

The square root of 2111789638 is about 45954.2124075693. The cubic root of 2111789638 is about 1282.9711331511.

The spelling of 2111789638 in words is "two billion, one hundred eleven million, seven hundred eighty-nine thousand, six hundred thirty-eight".