16229220 has 96 divisors (see below), whose sum is σ = 55012608. Its totient is φ = 3489792.

The previous prime is 16229219. The next prime is 16229221. The reversal of 16229220 is 2292261.

It is an interprime number because it is at equal distance from previous prime (16229219) and next prime (16229221).

It is not an unprimeable number, because it can be changed into a prime (16229221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6004 + ... + 8276.

It is an arithmetic number, because the mean of its divisors is an integer number (573048).

Almost surely, 2^16229220 is an apocalyptic number.

16229220 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 16229220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27506304).

16229220 is an abundant number, since it is smaller than the sum of its proper divisors (38783388).

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

16229220 is a wasteful number, since it uses less digits than its factorization.

16229220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309 (or 2307 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 16229220 is about 4028.5506078489. The cubic root of 16229220 is about 253.1818384783.

The spelling of 16229220 in words is "sixteen million, two hundred twenty-nine thousand, two hundred twenty".