30690228 has 12 divisors (see below), whose sum is σ = 71610560. Its totient is φ = 10230072.

The previous prime is 30690223. The next prime is 30690269. The reversal of 30690228 is 82209603.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 30690195 and 30690204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30690223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1278748 + ... + 1278771.

Almost surely, 2^30690228 is an apocalyptic number.

It is an amenable number.

30690228 is an abundant number, since it is smaller than the sum of its proper divisors (40920332).

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

30690228 is a wasteful number, since it uses less digits than its factorization.

30690228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557526 (or 2557524 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 30690228 is about 5539.8761719013. The cubic root of 30690228 is about 313.0882037311.

The spelling of 30690228 in words is "thirty million, six hundred ninety thousand, two hundred twenty-eight".