2991885 has 32 divisors (see below), whose sum is σ = 5255040. Its totient is φ = 1444608.

The previous prime is 2991883. The next prime is 2991887. The reversal of 2991885 is 5881992.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2991883) and next prime (2991887).

It is not a de Polignac number, because 2991885 - 2¹ = 2991883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12951 + ... + 13179.

It is an arithmetic number, because the mean of its divisors is an integer number (164220).

2^2991885 is an apocalyptic number.

It is an amenable number.

2991885 is a deficient number, since it is larger than the sum of its proper divisors (2263155).

2991885 is a wasteful number, since it uses less digits than its factorization.

2991885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its digits is 51840, while the sum is 42.

The square root of 2991885 is about 1729.7066225230. The cubic root of 2991885 is about 144.0947967627.

It can be divided in two parts, 29918 and 85, that added together give a palindrome (30003).

The spelling of 2991885 in words is "two million, nine hundred ninety-one thousand, eight hundred eighty-five".