16375644 has 72 divisors (see below), whose sum is σ = 44226000. Its totient is φ = 5094144.

The previous prime is 16375643. The next prime is 16375649. The reversal of 16375644 is 44657361.

It is a happy number.

16375644 is a `hidden beast` number, since 1 + 6 + 3 + 7 + 5 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16375599 and 16375608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16375643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60742 + ... + 61010.

It is an arithmetic number, because the mean of its divisors is an integer number (614250).

Almost surely, 2^16375644 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 16375644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22113000).

16375644 is an abundant number, since it is smaller than the sum of its proper divisors (27850356).

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

16375644 is a wasteful number, since it uses less digits than its factorization.

16375644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 382 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 16375644 is about 4046.6830861831. The cubic root of 16375644 is about 253.9409828370.

The spelling of 16375644 in words is "sixteen million, three hundred seventy-five thousand, six hundred forty-four".