16393916 has 96 divisors (see below), whose sum is σ = 39481344. Its totient is φ = 5760000.

The previous prime is 16393913. The next prime is 16393939. The reversal of 16393916 is 61939361.

16393916 = 974² + 975² + ... + 990².

It is a self number, because there is not a number n which added to its sum of digits gives 16393916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16393913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162266 + ... + 162366.

It is an arithmetic number, because the mean of its divisors is an integer number (411264).

Almost surely, 2^16393916 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 16393916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19740672).

16393916 is an abundant number, since it is smaller than the sum of its proper divisors (23087428).

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

16393916 is a wasteful number, since it uses less digits than its factorization.

16393916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 169 counting only the distinct ones).

The product of its digits is 26244, while the sum is 38.

The square root of 16393916 is about 4048.9401082259. The cubic root of 16393916 is about 254.0353971377.

It can be divided in two parts, 1639 and 3916, that added together give a palindrome (5555).

The spelling of 16393916 in words is "sixteen million, three hundred ninety-three thousand, nine hundred sixteen".