1002011994 has 48 divisors (see below), whose sum is σ = 2313485928. Its totient is φ = 312339456.

The previous prime is 1002011953. The next prime is 1002012007. The reversal of 1002011994 is 4991102001.

It can be written as a sum of positive squares in 4 ways, for example, as 1000773225 + 1238769 = 31635^2 + 1113^2 .

It is a super-2 number, since 2×1002011994² = 2008056072239712072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37614 + ... + 58470.

Almost surely, 2^1002011994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002011994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156742964).

1002011994 is an abundant number, since it is smaller than the sum of its proper divisors (1311473934).

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

1002011994 is a wasteful number, since it uses less digits than its factorization.

1002011994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21039 (or 21036 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1002011994 is about 31654.5730345554. The cubic root of 1002011994 is about 1000.6702153777.

Adding to 1002011994 its reverse (4991102001), we get a palindrome (5993113995).

The spelling of 1002011994 in words is "one billion, two million, eleven thousand, nine hundred ninety-four".