30280128 has 56 divisors (see below), whose sum is σ = 84838032. Its totient is φ = 9498624.

The previous prime is 30280109. The next prime is 30280139. The reversal of 30280128 is 82108203.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 30280098 and 30280107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1375 + ... + 7902.

Almost surely, 2^30280128 is an apocalyptic number.

It is an amenable number.

30280128 is an abundant number, since it is smaller than the sum of its proper divisors (54557904).

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

30280128 is a wasteful number, since it uses less digits than its factorization.

30280128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9309 (or 9299 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 30280128 is about 5502.7382274646. The cubic root of 30280128 is about 311.6873923451.

The spelling of 30280128 in words is "thirty million, two hundred eighty thousand, one hundred twenty-eight".