30091812 has 24 divisors (see below), whose sum is σ = 70303296. Its totient is φ = 10017888.

The previous prime is 30091781. The next prime is 30091813. The reversal of 30091812 is 21819003.

It is not an unprimeable number, because it can be changed into a prime (30091813) by changing a digit.

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, 16498 + ... + 18230.

It is an arithmetic number, because the mean of its divisors is an integer number (2929304).

Almost surely, 2^30091812 is an apocalyptic number.

It is an amenable number.

30091812 is an abundant number, since it is smaller than the sum of its proper divisors (40211484).

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

30091812 is a wasteful number, since it uses less digits than its factorization.

30091812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187 (or 3185 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 30091812 is about 5485.6004229255. The cubic root of 30091812 is about 311.0399069284.

It can be divided in two parts, 30091 and 812, that added together give a palindrome (30903).

The spelling of 30091812 in words is "thirty million, ninety-one thousand, eight hundred twelve".