1940051686 has 16 divisors (see below), whose sum is σ = 3059781840. Its totient is φ = 921221280.

The previous prime is 1940051681. The next prime is 1940051693. The reversal of 1940051686 is 6861500491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940051681) 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, 270636 + ... + 277711.

It is an arithmetic number, because the mean of its divisors is an integer number (191236365).

Almost surely, 2^1940051686 is an apocalyptic number.

1940051686 is a deficient number, since it is larger than the sum of its proper divisors (1119730154).

1940051686 is a wasteful number, since it uses less digits than its factorization.

1940051686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548439.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1940051686 is about 44046.0178222731. The cubic root of 1940051686 is about 1247.2047804037.

The spelling of 1940051686 in words is "one billion, nine hundred forty million, fifty-one thousand, six hundred eighty-six".