2981872 has 20 divisors (see below), whose sum is σ = 5809896. Its totient is φ = 1482560.

The previous prime is 2981857. The next prime is 2981873. The reversal of 2981872 is 2781892.

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 9 and base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3222 + ... + 4042.

2^2981872 is an apocalyptic number.

It is an amenable number.

2981872 is a deficient number, since it is larger than the sum of its proper divisors (2828024).

2981872 is a wasteful number, since it uses less digits than its factorization.

2981872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1050 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 2981872 is about 1726.8097752793. The cubic root of 2981872 is about 143.9338688112.

It can be divided in two parts, 29818 and 72, that added together give a triangular number (29890 = T₂₄₄).

The spelling of 2981872 in words is "two million, nine hundred eighty-one thousand, eight hundred seventy-two".