1940781842 has 16 divisors (see below), whose sum is σ = 2940347520. Its totient is φ = 960681168.

The previous prime is 1940781841. The next prime is 1940781889. The reversal of 1940781842 is 2481870491.

It is a junction number, because it is equal to n+sod(n) for n = 1940781793 and 1940781802.

It is not an unprimeable number, because it can be changed into a prime (1940781841) 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, 321173 + ... + 327159.

It is an arithmetic number, because the mean of its divisors is an integer number (183771720).

Almost surely, 2^1940781842 is an apocalyptic number.

1940781842 is a deficient number, since it is larger than the sum of its proper divisors (999565678).

1940781842 is a wasteful number, since it uses less digits than its factorization.

1940781842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7585.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 1940781842 is about 44054.3056011555. The cubic root of 1940781842 is about 1247.3612263788.

The spelling of 1940781842 in words is "one billion, nine hundred forty million, seven hundred eighty-one thousand, eight hundred forty-two".