30311228 has 6 divisors (see below), whose sum is σ = 53044656. Its totient is φ = 15155612.

The previous prime is 30311227. The next prime is 30311243. The reversal of 30311228 is 82211303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30311227) 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 as a sum of consecutive naturals, namely, 3788900 + ... + 3788907.

It is an arithmetic number, because the mean of its divisors is an integer number (8840776).

Almost surely, 2^30311228 is an apocalyptic number.

It is an amenable number.

30311228 is a deficient number, since it is larger than the sum of its proper divisors (22733428).

30311228 is a wasteful number, since it uses less digits than its factorization.

30311228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7577811 (or 7577809 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 30311228 is about 5505.5633680851. The cubic root of 30311228 is about 311.7940647381.

The spelling of 30311228 in words is "thirty million, three hundred eleven thousand, two hundred twenty-eight".