1001993886 has 24 divisors (see below), whose sum is σ = 2171665080. Its totient is φ = 333893616.

The previous prime is 1001993857. The next prime is 1001993887. The reversal of 1001993886 is 6883991001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001993887) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 69541 + ... + 82703.

It is an arithmetic number, because the mean of its divisors is an integer number (90486045).

Almost surely, 2^1001993886 is an apocalyptic number.

1001993886 is an abundant number, since it is smaller than the sum of its proper divisors (1169671194).

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

1001993886 is a wasteful number, since it uses less digits than its factorization.

1001993886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17400 (or 17397 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1001993886 is about 31654.2870082395. The cubic root of 1001993886 is about 1000.6641874241.

The spelling of 1001993886 in words is "one billion, one million, nine hundred ninety-three thousand, eight hundred eighty-six".