1940019289 has 8 divisors (see below), whose sum is σ = 2089644480. Its totient is φ = 1790450256.

The previous prime is 1940019287. The next prime is 1940019299. The reversal of 1940019289 is 9829100491.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1940019289 - 2¹ = 1940019287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1940019281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82182 + ... + 103120.

It is an arithmetic number, because the mean of its divisors is an integer number (261205560).

Almost surely, 2^1940019289 is an apocalyptic number.

It is an amenable number.

1940019289 is a deficient number, since it is larger than the sum of its proper divisors (149625191).

1940019289 is a wasteful number, since it uses less digits than its factorization.

1940019289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28079.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 1940019289 is about 44045.6500576391. The cubic root of 1940019289 is about 1247.1978379911.

The spelling of 1940019289 in words is "one billion, nine hundred forty million, nineteen thousand, two hundred eighty-nine".