1993438844 has 6 divisors (see below), whose sum is σ = 3488517984. Its totient is φ = 996719420.

The previous prime is 1993438831. The next prime is 1993438879. The reversal of 1993438844 is 4488343991.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 249179852 + ... + 249179859.

It is an arithmetic number, because the mean of its divisors is an integer number (581419664).

Almost surely, 2^1993438844 is an apocalyptic number.

It is an amenable number.

1993438844 is a deficient number, since it is larger than the sum of its proper divisors (1495079140).

1993438844 is a wasteful number, since it uses less digits than its factorization.

1993438844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498359715 (or 498359713 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 53.

The square root of 1993438844 is about 44647.9433344919. The cubic root of 1993438844 is about 1258.5417841045.

The spelling of 1993438844 in words is "one billion, nine hundred ninety-three million, four hundred thirty-eight thousand, eight hundred forty-four".