209542432 has 24 divisors (see below), whose sum is σ = 450040752. Its totient is φ = 95246400.

The previous prime is 209542427. The next prime is 209542439. The reversal of 209542432 is 234245902.

209542432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 209542394 and 209542403.

It is not an unprimeable number, because it can be changed into a prime (209542439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297294 + ... + 297997.

It is an arithmetic number, because the mean of its divisors is an integer number (18751698).

Almost surely, 2^209542432 is an apocalyptic number.

209542432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

209542432 is an abundant number, since it is smaller than the sum of its proper divisors (240498320).

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

209542432 is a wasteful number, since it uses less digits than its factorization.

209542432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595312 (or 595304 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 209542432 is about 14475.5805410353. The cubic root of 209542432 is about 593.9601752408.

The spelling of 209542432 in words is "two hundred nine million, five hundred forty-two thousand, four hundred thirty-two".