2891772 has 72 divisors (see below), whose sum is σ = 8133216. Its totient is φ = 860544.

The previous prime is 2891761. The next prime is 2891789. The reversal of 2891772 is 2771982.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 17233 + ... + 17399.

2^2891772 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 2891772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4066608).

2891772 is an abundant number, since it is smaller than the sum of its proper divisors (5241444).

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

2891772 is a wasteful number, since it uses less digits than its factorization.

2891772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 222 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2891772 is about 1700.5210966054. The cubic root of 2891772 is about 142.4693193413.

It can be divided in two parts, 2891 and 772, that added together give a palindrome (3663).

The spelling of 2891772 in words is "two million, eight hundred ninety-one thousand, seven hundred seventy-two".