16393776 has 80 divisors (see below), whose sum is σ = 48996864. Its totient is φ = 4626432.

The previous prime is 16393771. The next prime is 16393777. The reversal of 16393776 is 67739361.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (16393771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32341 + ... + 32843.

Almost surely, 2^16393776 is an apocalyptic number.

16393776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16393776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24498432).

16393776 is an abundant number, since it is smaller than the sum of its proper divisors (32603088).

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

16393776 is a wasteful number, since it uses less digits than its factorization.

16393776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 612 counting only the distinct ones).

The product of its digits is 142884, while the sum is 42.

The square root of 16393776 is about 4048.9228197139. The cubic root of 16393776 is about 254.0346740024.

It can be divided in two parts, 163 and 93776, that added together give a palindrome (93939).

The spelling of 16393776 in words is "sixteen million, three hundred ninety-three thousand, seven hundred seventy-six".