1993777944 has 64 divisors (see below), whose sum is σ = 5029365600. Its totient is φ = 658630656.

The previous prime is 1993777937. The next prime is 1993777957. The reversal of 1993777944 is 4497773991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1797262 + ... + 1798370.

Almost surely, 2^1993777944 is an apocalyptic number.

It is an amenable number.

1993777944 is an abundant number, since it is smaller than the sum of its proper divisors (3035587656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1993777944 is a wasteful number, since it uses less digits than its factorization.

1993777944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724 (or 1720 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 60.

The square root of 1993777944 is about 44651.7406603595. The cubic root of 1993777944 is about 1258.6131427558.

The spelling of 1993777944 in words is "one billion, nine hundred ninety-three million, seven hundred seventy-seven thousand, nine hundred forty-four".