1993878544 has 80 divisors (see below), whose sum is σ = 4760945280. Its totient is φ = 789765120.

The previous prime is 1993878529. The next prime is 1993878569. The reversal of 1993878544 is 4458783991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75822 + ... + 98674.

It is an arithmetic number, because the mean of its divisors is an integer number (59511816).

Almost surely, 2^1993878544 is an apocalyptic number.

1993878544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1993878544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2380472640).

1993878544 is an abundant number, since it is smaller than the sum of its proper divisors (2767066736).

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

1993878544 is a wasteful number, since it uses less digits than its factorization.

1993878544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22928 (or 22922 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 58.

The square root of 1993878544 is about 44652.8671419876. The cubic root of 1993878544 is about 1258.6343110029.

The spelling of 1993878544 in words is "one billion, nine hundred ninety-three million, eight hundred seventy-eight thousand, five hundred forty-four".