2209438872 has 24 divisors (see below), whose sum is σ = 5983897140. Its totient is φ = 736479600.

The previous prime is 2209438853. The next prime is 2209438877. The reversal of 2209438872 is 2788349022.

2209438872 is a `hidden beast` number, since 2 + 209 + 438 + 8 + 7 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209438877) 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, 15343254 + ... + 15343397.

Almost surely, 2^2209438872 is an apocalyptic number.

It is an amenable number.

2209438872 is an abundant number, since it is smaller than the sum of its proper divisors (3774458268).

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

2209438872 is a wasteful number, since it uses less digits than its factorization.

2209438872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30686663 (or 30686656 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 2209438872 is about 47004.6686191914. The cubic root of 2209438872 is about 1302.4488107075.

The spelling of 2209438872 in words is "two billion, two hundred nine million, four hundred thirty-eight thousand, eight hundred seventy-two".