16609420 has 48 divisors (see below), whose sum is σ = 37144800. Its totient is φ = 6220800.

The previous prime is 16609409. The next prime is 16609421. The reversal of 16609420 is 2490661.

It is not an unprimeable number, because it can be changed into a prime (16609421) 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 15 ways as a sum of consecutive naturals, for example, 41220 + ... + 41620.

It is an arithmetic number, because the mean of its divisors is an integer number (773850).

Almost surely, 2^16609420 is an apocalyptic number.

16609420 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 16609420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18572400).

16609420 is an abundant number, since it is smaller than the sum of its proper divisors (20535380).

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

16609420 is a wasteful number, since it uses less digits than its factorization.

16609420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 16609420 is about 4075.4656175706. The cubic root of 16609420 is about 255.1436842419.

The spelling of 16609420 in words is "sixteen million, six hundred nine thousand, four hundred twenty".