2891016 has 24 divisors (see below), whose sum is σ = 7830030. Its totient is φ = 963648.

The previous prime is 2891011. The next prime is 2891023. The reversal of 2891016 is 6101982.

It can be written as a sum of positive squares in only one way, i.e., 2414916 + 476100 = 1554^2 + 690^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (2891011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20005 + ... + 20148.

2^2891016 is an apocalyptic number.

It is an amenable number.

2891016 is an abundant number, since it is smaller than the sum of its proper divisors (4939014).

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

2891016 is a wasteful number, since it uses less digits than its factorization.

2891016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40165 (or 40158 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2891016 is about 1700.2987972706. The cubic root of 2891016 is about 142.4569029414.

Adding to 2891016 its reverse (6101982), we get a palindrome (8992998).

The spelling of 2891016 in words is "two million, eight hundred ninety-one thousand, sixteen".