1940138241 has 32 divisors (see below), whose sum is σ = 2790028800. Its totient is φ = 1195505280.

The previous prime is 1940138237. The next prime is 1940138267. The reversal of 1940138241 is 1428310491.

It is a happy number.

It is not a de Polignac number, because 1940138241 - 2² = 1940138237 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1940138281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 458626 + ... + 462836.

It is an arithmetic number, because the mean of its divisors is an integer number (87188400).

Almost surely, 2^1940138241 is an apocalyptic number.

It is an amenable number.

1940138241 is a deficient number, since it is larger than the sum of its proper divisors (849890559).

1940138241 is a wasteful number, since it uses less digits than its factorization.

1940138241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4429.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1940138241 is about 44047.0003632483. Note that the first 3 decimals coincide. The cubic root of 1940138241 is about 1247.2233280547.

The spelling of 1940138241 in words is "one billion, nine hundred forty million, one hundred thirty-eight thousand, two hundred forty-one".