16671744 has 132 divisors (see below), whose sum is σ = 50667344. Its totient is φ = 5474304.

The previous prime is 16671737. The next prime is 16671749. The reversal of 16671744 is 44717661.

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

Its product of digits (28224) is a multiple of the sum of its prime divisors (72).

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 16671699 and 16671708.

It is not an unprimeable number, because it can be changed into a prime (16671749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248799 + ... + 248865.

Almost surely, 2^16671744 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 16671744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25333672).

16671744 is an abundant number, since it is smaller than the sum of its proper divisors (33995600).

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

16671744 is an frugal number, since it uses more digits than its factorization.

16671744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 72 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 16671744 is about 4083.1047010823. The cubic root of 16671744 is about 255.4624135538.

The spelling of 16671744 in words is "sixteen million, six hundred seventy-one thousand, seven hundred forty-four".