16642230 has 128 divisors (see below), whose sum is σ = 47278080. Its totient is φ = 3709440.

The previous prime is 16642217. The next prime is 16642231. The reversal of 16642230 is 3224661.

It is a self number, because there is not a number n which added to its sum of digits gives 16642230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16642231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 354067 + ... + 354113.

It is an arithmetic number, because the mean of its divisors is an integer number (369360).

Almost surely, 2^16642230 is an apocalyptic number.

16642230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16642230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23639040).

16642230 is an abundant number, since it is smaller than the sum of its proper divisors (30635850).

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

16642230 is a wasteful number, since it uses less digits than its factorization.

16642230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 16642230 is about 4079.4889385804. The cubic root of 16642230 is about 255.3115760801.

Adding to 16642230 its reverse (3224661), we get a palindrome (19866891).

Subtracting from 16642230 its reverse (3224661), we obtain a square (13417569 = 3663²).

It can be divided in two parts, 16 and 642230, that added together give a palindrome (642246).

The spelling of 16642230 in words is "sixteen million, six hundred forty-two thousand, two hundred thirty".