30148728 has 16 divisors (see below), whose sum is σ = 75371880. Its totient is φ = 10049568.

The previous prime is 30148721. The next prime is 30148753. The reversal of 30148728 is 82784103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30148721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628075 + ... + 628122.

Almost surely, 2^30148728 is an apocalyptic number.

It is an amenable number.

30148728 is an abundant number, since it is smaller than the sum of its proper divisors (45223152).

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

30148728 is a wasteful number, since it uses less digits than its factorization.

30148728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256206 (or 1256202 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 30148728 is about 5490.7857361219. The cubic root of 30148728 is about 311.2358849101.

It can be divided in two parts, 30148 and 728, that added together give a triangular number (30876 = T₂₄₈).

The spelling of 30148728 in words is "thirty million, one hundred forty-eight thousand, seven hundred twenty-eight".