16393806 has 96 divisors (see below), whose sum is σ = 43347360. Its totient is φ = 4561920.

The previous prime is 16393781. The next prime is 16393837. The reversal of 16393806 is 60839361.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84846 + ... + 85038.

It is an arithmetic number, because the mean of its divisors is an integer number (451535).

Almost surely, 2^16393806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16393806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21673680).

16393806 is an abundant number, since it is smaller than the sum of its proper divisors (26953554).

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

16393806 is a wasteful number, since it uses less digits than its factorization.

16393806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 222 counting only the distinct ones).

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

The square root of 16393806 is about 4048.9265244013. The cubic root of 16393806 is about 254.0348289603.

It can be divided in two parts, 1639 and 3806, that added together give a palindrome (5445).

The spelling of 16393806 in words is "sixteen million, three hundred ninety-three thousand, eight hundred six".