30271428 has 96 divisors (see below), whose sum is σ = 86929920. Its totient is φ = 9033120.

The previous prime is 30271411. The next prime is 30271429. The reversal of 30271428 is 82417203.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (30271429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98451 + ... + 98757.

It is an arithmetic number, because the mean of its divisors is an integer number (905520).

Almost surely, 2^30271428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30271428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43464960).

30271428 is an abundant number, since it is smaller than the sum of its proper divisors (56658492).

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

30271428 is a wasteful number, since it uses less digits than its factorization.

30271428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 30271428 is about 5501.9476551490. The cubic root of 30271428 is about 311.6575384415.

The spelling of 30271428 in words is "thirty million, two hundred seventy-one thousand, four hundred twenty-eight".