30155228 has 24 divisors (see below), whose sum is σ = 54319440. Its totient is φ = 14641920.

The previous prime is 30155227. The next prime is 30155239. The reversal of 30155228 is 82255103.

It is a junction number, because it is equal to n+sod(n) for n = 30155197 and 30155206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30155221) 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, 19508 + ... + 20996.

It is an arithmetic number, because the mean of its divisors is an integer number (2263310).

Almost surely, 2^30155228 is an apocalyptic number.

It is an amenable number.

30155228 is a deficient number, since it is larger than the sum of its proper divisors (24164212).

30155228 is a wasteful number, since it uses less digits than its factorization.

30155228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1635 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 30155228 is about 5491.3776049367. The cubic root of 30155228 is about 311.2582505622.

The spelling of 30155228 in words is "thirty million, one hundred fifty-five thousand, two hundred twenty-eight".