30311248 has 20 divisors (see below), whose sum is σ = 64067328. Its totient is φ = 13777760.

The previous prime is 30311243. The next prime is 30311257. The reversal of 30311248 is 84211303.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30311243) 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 3 ways as a sum of consecutive naturals, for example, 85936 + ... + 86287.

Almost surely, 2^30311248 is an apocalyptic number.

It is an amenable number.

30311248 is an abundant number, since it is smaller than the sum of its proper divisors (33756080).

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

30311248 is a wasteful number, since it uses less digits than its factorization.

30311248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172242 (or 172236 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 30311248 is about 5505.5651844293. The cubic root of 30311248 is about 311.7941333142.

The spelling of 30311248 in words is "thirty million, three hundred eleven thousand, two hundred forty-eight".