209442432 has 128 divisors (see below), whose sum is σ = 582966720. Its totient is φ = 66560000.

The previous prime is 209442427. The next prime is 209442503. The reversal of 209442432 is 234244902.

209442432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×209442432² = 87732264644149248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 209442432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 834307 + ... + 834557.

Almost surely, 2^209442432 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 209442432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291483360).

209442432 is an abundant number, since it is smaller than the sum of its proper divisors (373524288).

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

209442432 is a wasteful number, since it uses less digits than its factorization.

209442432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 209442432 is about 14472.1260359354. The cubic root of 209442432 is about 593.8656749400.

The spelling of 209442432 in words is "two hundred nine million, four hundred forty-two thousand, four hundred thirty-two".