13629816 has 64 divisors (see below), whose sum is σ = 38340000. Its totient is φ = 4485888.

The previous prime is 13629809. The next prime is 13629817. The reversal of 13629816 is 61892631.

13629816 is a `hidden beast` number, since 13 + 629 + 8 + 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 (13629817) 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, 18870 + ... + 19578.

Almost surely, 2^13629816 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 13629816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19170000).

13629816 is an abundant number, since it is smaller than the sum of its proper divisors (24710184).

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

13629816 is a wasteful number, since it uses less digits than its factorization.

13629816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813 (or 803 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 13629816 is about 3691.8580687778. The cubic root of 13629816 is about 238.8709468247.

The spelling of 13629816 in words is "thirteen million, six hundred twenty-nine thousand, eight hundred sixteen".