16672220 has 48 divisors (see below), whose sum is σ = 36288000. Its totient is φ = 6431040.

The previous prime is 16672207. The next prime is 16672231. The reversal of 16672220 is 2227661.

It is a self number, because there is not a number n which added to its sum of digits gives 16672220.

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, 83681 + ... + 83879.

It is an arithmetic number, because the mean of its divisors is an integer number (756000).

Almost surely, 2^16672220 is an apocalyptic number.

16672220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16672220 is an abundant number, since it is smaller than the sum of its proper divisors (19615780).

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

16672220 is a wasteful number, since it uses less digits than its factorization.

16672220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 16672220 is about 4083.1629896442. The cubic root of 16672220 is about 255.4648447922.

Adding to 16672220 its reverse (2227661), we get a palindrome (18899881).

The spelling of 16672220 in words is "sixteen million, six hundred seventy-two thousand, two hundred twenty".