16920228 has 24 divisors (see below), whose sum is σ = 42517888. Its totient is φ = 5206176.

The previous prime is 16920221. The next prime is 16920251. The reversal of 16920228 is 82202961.

It is a junction number, because it is equal to n+sod(n) for n = 16920195 and 16920204.

It is not an unprimeable number, because it can be changed into a prime (16920221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54076 + ... + 54387.

Almost surely, 2^16920228 is an apocalyptic number.

It is an amenable number.

16920228 is an abundant number, since it is smaller than the sum of its proper divisors (25597660).

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

16920228 is a wasteful number, since it uses less digits than its factorization.

16920228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108483 (or 108481 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 16920228 is about 4113.4204744956. The cubic root of 16920228 is about 256.7253395598.

The spelling of 16920228 in words is "sixteen million, nine hundred twenty thousand, two hundred twenty-eight".