2647872 has 42 divisors (see below), whose sum is σ = 7591298. Its totient is φ = 882432.

The previous prime is 2647847. The next prime is 2647873. The reversal of 2647872 is 2787462.

2647872 is a `hidden beast` number, since 2 + 647 + 8 + 7 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1679616 + 968256 = 1296^2 + 984^2 .

It is a super-2 number, since 2×2647872² = 14022452256768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2647873) 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, 1723 + ... + 2874.

2^2647872 is an apocalyptic number.

It is an amenable number.

2647872 is an abundant number, since it is smaller than the sum of its proper divisors (4943426).

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

2647872 is a wasteful number, since it uses less digits than its factorization.

2647872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4615 (or 4602 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 2647872 is about 1627.2283183377. The cubic root of 2647872 is about 138.3456991252.

The spelling of 2647872 in words is "two million, six hundred forty-seven thousand, eight hundred seventy-two".