16220412 has 60 divisors (see below), whose sum is σ = 45677016. Its totient is φ = 4989600.

The previous prime is 16220411. The next prime is 16220419. The reversal of 16220412 is 21402261.

16220412 is a `hidden beast` number, since 1 + 622 + 0 + 41 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220411) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2287 + ... + 6137.

Almost surely, 2^16220412 is an apocalyptic number.

16220412 is a gapful number since it is divisible by the number (12) 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 16220412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22838508).

16220412 is an abundant number, since it is smaller than the sum of its proper divisors (29456604).

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

16220412 is a wasteful number, since it uses less digits than its factorization.

16220412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880 (or 3869 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 16220412 is about 4027.4572623431. The cubic root of 16220412 is about 253.1360275031.

Adding to 16220412 its reverse (21402261), we get a palindrome (37622673).

The spelling of 16220412 in words is "sixteen million, two hundred twenty thousand, four hundred twelve".