16349220 has 72 divisors (see below), whose sum is σ = 50439480. Its totient is φ = 4285440.

The previous prime is 16349209. The next prime is 16349231. The reversal of 16349220 is 2294361.

16349220 is a `hidden beast` number, since 1 + 634 + 9 + 2 + 20 = 666.

16349220 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16349209) and next prime (16349231).

It can be written as a sum of positive squares in 4 ways, for example, as 285156 + 16064064 = 534^2 + 4008^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10236 + ... + 11724.

Almost surely, 2^16349220 is an apocalyptic number.

16349220 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 16349220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25219740).

16349220 is an abundant number, since it is smaller than the sum of its proper divisors (34090260).

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

16349220 is a wasteful number, since it uses less digits than its factorization.

16349220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 16349220 is about 4043.4168719043. The cubic root of 16349220 is about 253.8043215661.

The spelling of 16349220 in words is "sixteen million, three hundred forty-nine thousand, two hundred twenty".