16390836 has 168 divisors, whose sum is σ = 54352704. Its totient is φ = 4199040.

The previous prime is 16390831. The next prime is 16390837. The reversal of 16390836 is 63809361.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 16390836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16390831) by changing a digit.

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 55 ways as a sum of consecutive naturals, for example, 224496 + ... + 224568.

It is an arithmetic number, because the mean of its divisors is an integer number (323528).

Almost surely, 2^16390836 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 16390836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27176352).

16390836 is an abundant number, since it is smaller than the sum of its proper divisors (37961868).

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

16390836 is a wasteful number, since it uses less digits than its factorization.

16390836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 96 counting only the distinct ones).

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

The square root of 16390836 is about 4048.5597439089. The cubic root of 16390836 is about 254.0194872105.

The spelling of 16390836 in words is "sixteen million, three hundred ninety thousand, eight hundred thirty-six".