16406620 has 12 divisors (see below), whose sum is σ = 34453944. Its totient is φ = 6562640.

The previous prime is 16406617. The next prime is 16406629. The reversal of 16406620 is 2660461.

It is a happy number.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16406629) 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 3 ways as a sum of consecutive naturals, for example, 410146 + ... + 410185.

It is an arithmetic number, because the mean of its divisors is an integer number (2871162).

Almost surely, 2^16406620 is an apocalyptic number.

16406620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16406620 is an abundant number, since it is smaller than the sum of its proper divisors (18047324).

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

16406620 is a wasteful number, since it uses less digits than its factorization.

16406620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820340 (or 820338 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 16406620 is about 4050.5086100390. The cubic root of 16406620 is about 254.1009993692.

The spelling of 16406620 in words is "sixteen million, four hundred six thousand, six hundred twenty".