16409232 has 120 divisors (see below), whose sum is σ = 53441024. Its totient is φ = 4603392.

The previous prime is 16409227. The next prime is 16409249. The reversal of 16409232 is 23290461.

It is a junction number, because it is equal to n+sod(n) for n = 16409196 and 16409205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73473 + ... + 73695.

Almost surely, 2^16409232 is an apocalyptic number.

16409232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16409232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26720512).

16409232 is an abundant number, since it is smaller than the sum of its proper divisors (37031792).

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

16409232 is a wasteful number, since it uses less digits than its factorization.

16409232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 16409232 is about 4050.8310258514. The cubic root of 16409232 is about 254.1144832879.

Adding to 16409232 its reverse (23290461), we get a palindrome (39699693).

It can be divided in two parts, 16409 and 232, that added together give a square (16641 = 129²).

The spelling of 16409232 in words is "sixteen million, four hundred nine thousand, two hundred thirty-two".