16222620 has 48 divisors (see below), whose sum is σ = 45890208. Its totient is φ = 4281600.

The previous prime is 16222553. The next prime is 16222631. The reversal of 16222620 is 2622261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4722 + ... + 7398.

It is an arithmetic number, because the mean of its divisors is an integer number (956046).

Almost surely, 2^16222620 is an apocalyptic number.

16222620 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 16222620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22945104).

16222620 is an abundant number, since it is smaller than the sum of its proper divisors (29667588).

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

16222620 is a wasteful number, since it uses less digits than its factorization.

16222620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790 (or 2788 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 16222620 is about 4027.7313713802. The cubic root of 16222620 is about 253.1475130106.

Adding to 16222620 its reverse (2622261), we get a palindrome (18844881).

The spelling of 16222620 in words is "sixteen million, two hundred twenty-two thousand, six hundred twenty".