1912183638 has 16 divisors (see below), whose sum is σ = 3826946736. Its totient is φ = 636964640.

The previous prime is 1912183619. The next prime is 1912183639. The reversal of 1912183638 is 8363812191.

It is a self number, because there is not a number n which added to its sum of digits gives 1912183638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912183639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97773 + ... + 115688.

It is an arithmetic number, because the mean of its divisors is an integer number (239184171).

Almost surely, 2^1912183638 is an apocalyptic number.

1912183638 is an abundant number, since it is smaller than the sum of its proper divisors (1914763098).

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

1912183638 is a wasteful number, since it uses less digits than its factorization.

1912183638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214959.

The product of its digits is 62208, while the sum is 42.

The square root of 1912183638 is about 43728.5220193868. The cubic root of 1912183638 is about 1241.2040935754.

The spelling of 1912183638 in words is "one billion, nine hundred twelve million, one hundred eighty-three thousand, six hundred thirty-eight".