16409432 has 32 divisors (see below), whose sum is σ = 33551280. Its totient is φ = 7478400.

The previous prime is 16409431. The next prime is 16409461. The reversal of 16409432 is 23490461.

It is a junction number, because it is equal to n+sod(n) for n = 16409395 and 16409404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16409431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7682 + ... + 9582.

Almost surely, 2^16409432 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 16409432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16775640).

16409432 is an abundant number, since it is smaller than the sum of its proper divisors (17141848).

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

16409432 is a wasteful number, since it uses less digits than its factorization.

16409432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003 (or 1999 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 16409432 is about 4050.8557120687. The cubic root of 16409432 is about 254.1155156882.

Adding to 16409432 its reverse (23490461), we get a palindrome (39899893).

The spelling of 16409432 in words is "sixteen million, four hundred nine thousand, four hundred thirty-two".