16303644 has 72 divisors (see below), whose sum is σ = 48642048. Its totient is φ = 4505760.

The previous prime is 16303603. The next prime is 16303657. The reversal of 16303644 is 44630361.

16303644 is a `hidden beast` number, since 16 + 3 + 0 + 3 + 644 = 666.

16303644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6769 + ... + 8855.

It is an arithmetic number, because the mean of its divisors is an integer number (675584).

Almost surely, 2^16303644 is an apocalyptic number.

16303644 is a gapful number since it is divisible by the number (14) 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 16303644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24321024).

16303644 is an abundant number, since it is smaller than the sum of its proper divisors (32338404).

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

16303644 is a wasteful number, since it uses less digits than its factorization.

16303644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135 (or 2130 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 16303644 is about 4037.7771112334. Note that the first 3 decimals coincide. The cubic root of 16303644 is about 253.5682623725.

The spelling of 16303644 in words is "sixteen million, three hundred three thousand, six hundred forty-four".