1791994236 has 72 divisors (see below), whose sum is σ = 4322702160. Its totient is φ = 577584384.

The previous prime is 1791994231. The next prime is 1791994307. The reversal of 1791994236 is 6324991971.

It is a super-2 number, since 2×1791994236² = 6422486683714447392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1791994231) 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 23 ways as a sum of consecutive naturals, for example, 4381200 + ... + 4381608.

It is an arithmetic number, because the mean of its divisors is an integer number (60037530).

Almost surely, 2^1791994236 is an apocalyptic number.

It is an amenable number.

1791994236 is an abundant number, since it is smaller than the sum of its proper divisors (2530707924).

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

1791994236 is a wasteful number, since it uses less digits than its factorization.

1791994236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 550 counting only the distinct ones).

The product of its digits is 734832, while the sum is 51.

The square root of 1791994236 is about 42331.9528961280. The cubic root of 1791994236 is about 1214.6342864498.

The spelling of 1791994236 in words is "one billion, seven hundred ninety-one million, nine hundred ninety-four thousand, two hundred thirty-six".