30361812 has 96 divisors (see below), whose sum is σ = 80607744. Its totient is φ = 8832000.

The previous prime is 30361777. The next prime is 30361823. The reversal of 30361812 is 21816303.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 300562 + ... + 300662.

It is an arithmetic number, because the mean of its divisors is an integer number (839664).

Almost surely, 2^30361812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30361812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40303872).

30361812 is an abundant number, since it is smaller than the sum of its proper divisors (50245932).

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

30361812 is a wasteful number, since it uses less digits than its factorization.

30361812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 30361812 is about 5510.1553517120. The cubic root of 30361812 is about 311.9674111261.

The spelling of 30361812 in words is "thirty million, three hundred sixty-one thousand, eight hundred twelve".