2809072 has 30 divisors (see below), whose sum is σ = 6332928. Its totient is φ = 1203552.

The previous prime is 2809069. The next prime is 2809073. The reversal of 2809072 is 2709082.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 2809072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2809073) 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, 1008 + ... + 2575.

2^2809072 is an apocalyptic number.

It is an amenable number.

2809072 is an abundant number, since it is smaller than the sum of its proper divisors (3523856).

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

2809072 is a wasteful number, since it uses less digits than its factorization.

2809072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605 (or 3592 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2809072 is about 1676.0286393734. The cubic root of 2809072 is about 141.0980321898.

The spelling of 2809072 in words is "two million, eight hundred nine thousand, seventy-two".