623220228 has 18 divisors (see below), whose sum is σ = 1575362334. Its totient is φ = 207740064.

The previous prime is 623220211. The next prime is 623220229. The reversal of 623220228 is 822022326.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 408363264 + 214856964 = 20208^2 + 14658^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (623220229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8655801 + ... + 8655872.

Almost surely, 2^623220228 is an apocalyptic number.

It is an amenable number.

623220228 is an abundant number, since it is smaller than the sum of its proper divisors (952142106).

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

623220228 is a wasteful number, since it uses less digits than its factorization.

623220228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17311683 (or 17311678 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 623220228 is about 24964.3791831481. The cubic root of 623220228 is about 854.1756371545.

The spelling of 623220228 in words is "six hundred twenty-three million, two hundred twenty thousand, two hundred twenty-eight".