1994993886 has 32 divisors (see below), whose sum is σ = 4023895680. Its totient is φ = 659359584.

The previous prime is 1994993881. The next prime is 1994993887. The reversal of 1994993886 is 6883994991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994993881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236016 + ... + 1237628.

It is an arithmetic number, because the mean of its divisors is an integer number (125746740).

Almost surely, 2^1994993886 is an apocalyptic number.

1994993886 is an abundant number, since it is smaller than the sum of its proper divisors (2028901794).

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

1994993886 is a wasteful number, since it uses less digits than its factorization.

1994993886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240.

The product of its digits is 30233088, while the sum is 66.

The square root of 1994993886 is about 44665.3544259978. The cubic root of 1994993886 is about 1258.8689535191.

The spelling of 1994993886 in words is "one billion, nine hundred ninety-four million, nine hundred ninety-three thousand, eight hundred eighty-six".