16331328 has 112 divisors (see below), whose sum is σ = 51775360. Its totient is φ = 5018112.

The previous prime is 16331323. The next prime is 16331351. The reversal of 16331328 is 82313361.

It is a happy number.

16331328 is a `hidden beast` number, since 1 + 6 + 331 + 328 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (16331323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22101 + ... + 22827.

It is an arithmetic number, because the mean of its divisors is an integer number (462280).

Almost surely, 2^16331328 is an apocalyptic number.

16331328 is a gapful number since it is divisible by the number (18) 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 16331328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25887680).

16331328 is an abundant number, since it is smaller than the sum of its proper divisors (35444032).

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

16331328 is a wasteful number, since it uses less digits than its factorization.

16331328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 745 counting only the distinct ones).

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

The square root of 16331328 is about 4041.2037810534. The cubic root of 16331328 is about 253.7117029895.

Adding to 16331328 its reverse (82313361), we get a palindrome (98644689).

The spelling of 16331328 in words is "sixteen million, three hundred thirty-one thousand, three hundred twenty-eight".