30840528 has 40 divisors (see below), whose sum is σ = 81619776. Its totient is φ = 10028800.

The previous prime is 30840521. The next prime is 30840583. The reversal of 30840528 is 82504803.

It is a super-2 number, since 2×30840528² = 1902276334637568, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 30840495 and 30840504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30840521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5868 + ... + 9803.

Almost surely, 2^30840528 is an apocalyptic number.

It is an amenable number.

30840528 is an abundant number, since it is smaller than the sum of its proper divisors (50779248).

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

30840528 is a wasteful number, since it uses less digits than its factorization.

30840528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15723 (or 15717 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 30840528 is about 5553.4248892013. The cubic root of 30840528 is about 313.5984698141.

The spelling of 30840528 in words is "thirty million, eight hundred forty thousand, five hundred twenty-eight".