1940026791 has 16 divisors (see below), whose sum is σ = 2777442048. Its totient is φ = 1200124800.

The previous prime is 1940026789. The next prime is 1940026801. The reversal of 1940026791 is 1976200491.

It is not a de Polignac number, because 1940026791 - 2¹ = 1940026789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940026391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264265 + ... + 271506.

It is an arithmetic number, because the mean of its divisors is an integer number (173590128).

Almost surely, 2^1940026791 is an apocalyptic number.

1940026791 is a deficient number, since it is larger than the sum of its proper divisors (837415257).

1940026791 is a wasteful number, since it uses less digits than its factorization.

1940026791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535862.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 1940026791 is about 44045.7352192014. The cubic root of 1940026791 is about 1247.1994456153.

The spelling of 1940026791 in words is "one billion, nine hundred forty million, twenty-six thousand, seven hundred ninety-one".