16550040 has 96 divisors (see below), whose sum is σ = 53993520. Its totient is φ = 4034304.

The previous prime is 16549999. The next prime is 16550047. The reversal of 16550040 is 4005561.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16549989 and 16550016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16550047) 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 23 ways as a sum of consecutive naturals, for example, 160629 + ... + 160731.

Almost surely, 2^16550040 is an apocalyptic number.

16550040 is a gapful number since it is divisible by the number (10) 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 16550040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26996760).

16550040 is an abundant number, since it is smaller than the sum of its proper divisors (37443480).

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

16550040 is a wasteful number, since it uses less digits than its factorization.

16550040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 16550040 is about 4068.1740375751. The cubic root of 16550040 is about 254.8392681819.

It can be divided in two parts, 165 and 50040, that added together give a palindrome (50205).

The spelling of 16550040 in words is "sixteen million, five hundred fifty thousand, forty".