2138941242 has 40 divisors (see below), whose sum is σ = 4796095392. Its totient is φ = 712492200.

The previous prime is 2138941237. The next prime is 2138941319. The reversal of 2138941242 is 2421498312.

It is a junction number, because it is equal to n+sod(n) for n = 2138941197 and 2138941206.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 293017 + ... + 300227.

Almost surely, 2^2138941242 is an apocalyptic number.

2138941242 is an abundant number, since it is smaller than the sum of its proper divisors (2657154150).

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

2138941242 is a wasteful number, since it uses less digits than its factorization.

2138941242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9056 (or 9047 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 2138941242 is about 46248.6890841243. The cubic root of 2138941242 is about 1288.4461875854.

The spelling of 2138941242 in words is "two billion, one hundred thirty-eight million, nine hundred forty-one thousand, two hundred forty-two".