2772891 has 24 divisors (see below), whose sum is σ = 4493424. Its totient is φ = 1632960.

The previous prime is 2772883. The next prime is 2772901. The reversal of 2772891 is 1982772.

It is not a de Polignac number, because 2772891 - 2³ = 2772883 is a prime.

2772891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2772881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3285 + ... + 4041.

It is an arithmetic number, because the mean of its divisors is an integer number (187226).

2^2772891 is an apocalyptic number.

2772891 is a deficient number, since it is larger than the sum of its proper divisors (1720533).

2772891 is a wasteful number, since it uses less digits than its factorization.

2772891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 808 counting only the distinct ones).

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

The square root of 2772891 is about 1665.1999879894. The cubic root of 2772891 is about 140.4896291362.

It can be divided in two parts, 2772 and 891, that added together give a palindrome (3663).

The spelling of 2772891 in words is "two million, seven hundred seventy-two thousand, eight hundred ninety-one".