30028840 has 16 divisors (see below), whose sum is σ = 67564980. Its totient is φ = 12011520.

The previous prime is 30028837. The next prime is 30028853. The reversal of 30028840 is 4882003.

It can be written as a sum of positive squares in 2 ways, for example, as 28238596 + 1790244 = 5314^2 + 1338^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375321 + ... + 375400.

Almost surely, 2^30028840 is an apocalyptic number.

It is an amenable number.

30028840 is an abundant number, since it is smaller than the sum of its proper divisors (37536140).

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

30028840 is a wasteful number, since it uses less digits than its factorization.

30028840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750732 (or 750728 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 30028840 is about 5479.8576623850. The cubic root of 30028840 is about 310.8227882453.

The spelling of 30028840 in words is "thirty million, twenty-eight thousand, eight hundred forty".