30328840 has 32 divisors (see below), whose sum is σ = 68439960. Its totient is φ = 12096000.

The previous prime is 30328813. The next prime is 30328847. The reversal of 30328840 is 4882303.

It can be written as a sum of positive squares in 4 ways, for example, as 8031556 + 22297284 = 2834^2 + 4722^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 30328799 and 30328808.

It is not an unprimeable number, because it can be changed into a prime (30328847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15940 + ... + 17740.

Almost surely, 2^30328840 is an apocalyptic number.

It is an amenable number.

30328840 is an abundant number, since it is smaller than the sum of its proper divisors (38111120).

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

30328840 is a wasteful number, since it uses less digits than its factorization.

30328840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 30328840 is about 5507.1626088214. The cubic root of 30328840 is about 311.8544411972.

The spelling of 30328840 in words is "thirty million, three hundred twenty-eight thousand, eight hundred forty".