2990991894 has 96 divisors (see below), whose sum is σ = 6994615680. Its totient is φ = 843264000.

The previous prime is 2990991863. The next prime is 2990991907. The reversal of 2990991894 is 4981990992.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4665814 + ... + 4666454.

It is an arithmetic number, because the mean of its divisors is an integer number (72860580).

Almost surely, 2^2990991894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2990991894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3497307840).

2990991894 is an abundant number, since it is smaller than the sum of its proper divisors (4003623786).

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

2990991894 is a wasteful number, since it uses less digits than its factorization.

2990991894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 60.

The square root of 2990991894 is about 54689.9615468872. The cubic root of 2990991894 is about 1440.8045744872.

The spelling of 2990991894 in words is "two billion, nine hundred ninety million, nine hundred ninety-one thousand, eight hundred ninety-four".