1939442636 has 6 divisors (see below), whose sum is σ = 3394024620. Its totient is φ = 969721316.

The previous prime is 1939442633. The next prime is 1939442647. The reversal of 1939442636 is 6362449391.

It is a super-2 number, since 2×1939442636² = 7522875476669256992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1939442633) 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 as a sum of consecutive naturals, namely, 242430326 + ... + 242430333.

It is an arithmetic number, because the mean of its divisors is an integer number (565670770).

Almost surely, 2^1939442636 is an apocalyptic number.

It is an amenable number.

1939442636 is a deficient number, since it is larger than the sum of its proper divisors (1454581984).

1939442636 is a wasteful number, since it uses less digits than its factorization.

1939442636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484860663 (or 484860661 counting only the distinct ones).

The product of its digits is 839808, while the sum is 47.

The square root of 1939442636 is about 44039.1034876960. The cubic root of 1939442636 is about 1247.0742530265.

The spelling of 1939442636 in words is "one billion, nine hundred thirty-nine million, four hundred forty-two thousand, six hundred thirty-six".