16220620 has 36 divisors (see below), whose sum is σ = 36892800. Its totient is φ = 5987904.

The previous prime is 16220609. The next prime is 16220621. The reversal of 16220620 is 2602261.

It is a super-3 number, since 3×16220620³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16220621) 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 11 ways as a sum of consecutive naturals, for example, 981 + ... + 5779.

It is an arithmetic number, because the mean of its divisors is an integer number (1024800).

Almost surely, 2^16220620 is an apocalyptic number.

16220620 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 16220620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18446400).

16220620 is an abundant number, since it is smaller than the sum of its proper divisors (20672180).

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

16220620 is a wasteful number, since it uses less digits than its factorization.

16220620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4834 (or 4819 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 16220620 is about 4027.4830850048. The cubic root of 16220620 is about 253.1371095157.

Adding to 16220620 its reverse (2602261), we get a palindrome (18822881).

The spelling of 16220620 in words is "sixteen million, two hundred twenty thousand, six hundred twenty".