30185808 has 40 divisors (see below), whose sum is σ = 78188448. Its totient is φ = 10035072.

The previous prime is 30185791. The next prime is 30185833. The reversal of 30185808 is 80858103.

It is a super-2 number, since 2×30185808² = 1822366009225728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26466 + ... + 27582.

Almost surely, 2^30185808 is an apocalyptic number.

It is an amenable number.

30185808 is an abundant number, since it is smaller than the sum of its proper divisors (48002640).

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

30185808 is a wasteful number, since it uses less digits than its factorization.

30185808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 30185808 is about 5494.1612644698. The cubic root of 30185808 is about 311.3634292470.

The spelling of 30185808 in words is "thirty million, one hundred eighty-five thousand, eight hundred eight".