2909872 has 20 divisors (see below), whose sum is σ = 6443536. Its totient is φ = 1247040.

The previous prime is 2909867. The next prime is 2909909. The reversal of 2909872 is 2789092.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12879 + ... + 13102.

2^2909872 is an apocalyptic number.

It is an amenable number.

2909872 is an abundant number, since it is smaller than the sum of its proper divisors (3533664).

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

2909872 is a wasteful number, since it uses less digits than its factorization.

2909872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25996 (or 25990 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 2909872 is about 1705.8346930462. The cubic root of 2909872 is about 142.7659463662.

The spelling of 2909872 in words is "two million, nine hundred nine thousand, eight hundred seventy-two".