2891988 has 72 divisors (see below), whose sum is σ = 8168160. Its totient is φ = 855360.

The previous prime is 2891981. The next prime is 2892013. The reversal of 2891988 is 8891982.

Its product of digits (82944) is a multiple of the sum of its prime divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26478 + ... + 26586.

2^2891988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2891988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4084080).

2891988 is an abundant number, since it is smaller than the sum of its proper divisors (5276172).

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

2891988 is a wasteful number, since it uses less digits than its factorization.

2891988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 192 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 2891988 is about 1700.5846053637. The cubic root of 2891988 is about 142.4728664866.

The spelling of 2891988 in words is "two million, eight hundred ninety-one thousand, nine hundred eighty-eight".