30212812 has 72 divisors (see below), whose sum is σ = 66141600. Its totient is φ = 12065760.

The previous prime is 30212807. The next prime is 30212821. The reversal of 30212812 is 21821203.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 30212812.

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 23 ways as a sum of consecutive naturals, for example, 495262 + ... + 495322.

Almost surely, 2^30212812 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 30212812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33070800).

30212812 is an abundant number, since it is smaller than the sum of its proper divisors (35928788).

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

30212812 is a wasteful number, since it uses less digits than its factorization.

30212812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 30212812 is about 5496.6182330593. The cubic root of 30212812 is about 311.4562493787.

The spelling of 30212812 in words is "thirty million, two hundred twelve thousand, eight hundred twelve".