16639416 has 48 divisors (see below), whose sum is σ = 45840600. Its totient is φ = 5451072.

The previous prime is 16639411. The next prime is 16639423. The reversal of 16639416 is 61493661.

16639416 is a `hidden beast` number, since 1 + 6 + 639 + 4 + 16 = 666.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16639411) 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, 2290 + ... + 6206.

Almost surely, 2^16639416 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 16639416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22920300).

16639416 is an abundant number, since it is smaller than the sum of its proper divisors (29201184).

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

16639416 is a wasteful number, since it uses less digits than its factorization.

16639416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988 (or 3981 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 16639416 is about 4079.1440278568. The cubic root of 16639416 is about 255.2971852348.

The spelling of 16639416 in words is "sixteen million, six hundred thirty-nine thousand, four hundred sixteen".