209472872 has 32 divisors (see below), whose sum is σ = 472497600. Its totient is φ = 85048704.

The previous prime is 209472869. The next prime is 209472877. The reversal of 209472872 is 278274902.

209472872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (209472877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97373 + ... + 99500.

It is an arithmetic number, because the mean of its divisors is an integer number (14765550).

Almost surely, 2^209472872 is an apocalyptic number.

It is an amenable number.

209472872 is an abundant number, since it is smaller than the sum of its proper divisors (263024728).

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

209472872 is a wasteful number, since it uses less digits than its factorization.

209472872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196905 (or 196901 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 209472872 is about 14473.1776745813. The cubic root of 209472872 is about 593.8944440156.

The spelling of 209472872 in words is "two hundred nine million, four hundred seventy-two thousand, eight hundred seventy-two".