16405116 has 96 divisors (see below), whose sum is σ = 47943168. Its totient is φ = 4250880.

The previous prime is 16405099. The next prime is 16405121. The reversal of 16405116 is 61150461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90546 + ... + 90726.

It is an arithmetic number, because the mean of its divisors is an integer number (499408).

Almost surely, 2^16405116 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 16405116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23971584).

16405116 is an abundant number, since it is smaller than the sum of its proper divisors (31538052).

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

16405116 is a wasteful number, since it uses less digits than its factorization.

16405116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 16405116 is about 4050.3229500868. The cubic root of 16405116 is about 254.0932346258.

Adding to 16405116 its reverse (61150461), we get a palindrome (77555577).

The spelling of 16405116 in words is "sixteen million, four hundred five thousand, one hundred sixteen".