1940938447 has 8 divisors (see below), whose sum is σ = 2232906752. Its totient is φ = 1652643000.

The previous prime is 1940938423. The next prime is 1940938453. The reversal of 1940938447 is 7448390491.

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 1940938447 - 2¹⁵ = 1940905679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1940938447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940938457) 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 7 ways as a sum of consecutive naturals, for example, 917079 + ... + 919192.

It is an arithmetic number, because the mean of its divisors is an integer number (279113344).

Almost surely, 2^1940938447 is an apocalyptic number.

1940938447 is a deficient number, since it is larger than the sum of its proper divisors (291968305).

1940938447 is a wasteful number, since it uses less digits than its factorization.

1940938447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836429.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 1940938447 is about 44056.0829738641. The cubic root of 1940938447 is about 1247.3947760454.

The spelling of 1940938447 in words is "one billion, nine hundred forty million, nine hundred thirty-eight thousand, four hundred forty-seven".