2209450438872 has 160 divisors (see below), whose sum is σ = 6467908154400. Its totient is φ = 703756118016.

The previous prime is 2209450438823. The next prime is 2209450438889. The reversal of 2209450438872 is 2788340549022.

2209450438872 is a `hidden beast` number, since 2 + 2 + 0 + 9 + 450 + 43 + 88 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1216773 + ... + 2428875.

It is an arithmetic number, because the mean of its divisors is an integer number (40424425965).

Almost surely, 2^{2209450438872} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2209450438872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3233954077200).

2209450438872 is an abundant number, since it is smaller than the sum of its proper divisors (4258457715528).

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

2209450438872 is a wasteful number, since it uses less digits than its factorization.

2209450438872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212247 (or 1212234 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 2209450438872 in words is "two trillion, two hundred nine billion, four hundred fifty million, four hundred thirty-eight thousand, eight hundred seventy-two".