2194758138 has 16 divisors (see below), whose sum is σ = 4390031520. Its totient is φ = 731500176.

The previous prime is 2194758131. The next prime is 2194758151. The reversal of 2194758138 is 8318574912.

2194758138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2194758131) 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, 54693 + ... + 85911.

It is an arithmetic number, because the mean of its divisors is an integer number (274376970).

Almost surely, 2^2194758138 is an apocalyptic number.

2194758138 is an abundant number, since it is smaller than the sum of its proper divisors (2195273382).

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

2194758138 is a wasteful number, since it uses less digits than its factorization.

2194758138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42941.

The product of its digits is 483840, while the sum is 48.

The square root of 2194758138 is about 46848.2458369574. The cubic root of 2194758138 is about 1299.5576676569.

The spelling of 2194758138 in words is "two billion, one hundred ninety-four million, seven hundred fifty-eight thousand, one hundred thirty-eight".