1940543667 has 24 divisors (see below), whose sum is σ = 2828358000. Its totient is φ = 1282037568.

The previous prime is 1940543639. The next prime is 1940543687. The reversal of 1940543667 is 7663450491.

1940543667 is a `hidden beast` number, since 1 + 9 + 40 + 543 + 6 + 67 = 666.

It is not a de Polignac number, because 1940543667 - 2⁸ = 1940543411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1940543687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 681148 + ... + 683990.

It is an arithmetic number, because the mean of its divisors is an integer number (117848250).

Almost surely, 2^1940543667 is an apocalyptic number.

1940543667 is a deficient number, since it is larger than the sum of its proper divisors (887814333).

1940543667 is a wasteful number, since it uses less digits than its factorization.

1940543667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507 (or 3504 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 1940543667 is about 44051.6023204605. The cubic root of 1940543667 is about 1247.3101984189.

The spelling of 1940543667 in words is "one billion, nine hundred forty million, five hundred forty-three thousand, six hundred sixty-seven".