30012444 has 144 divisors (see below), whose sum is σ = 98332416. Its totient is φ = 7776000.

The previous prime is 30012443. The next prime is 30012473. The reversal of 30012444 is 44421003.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30012443) 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 47 ways as a sum of consecutive naturals, for example, 74644 + ... + 75044.

It is an arithmetic number, because the mean of its divisors is an integer number (682864).

Almost surely, 2^30012444 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 30012444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49166208).

30012444 is an abundant number, since it is smaller than the sum of its proper divisors (68319972).

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

30012444 is a wasteful number, since it uses less digits than its factorization.

30012444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 30012444 is about 5478.3614338596. The cubic root of 30012444 is about 310.7662073246.

Adding to 30012444 its reverse (44421003), we get a palindrome (74433447).

It can be divided in two parts, 3001 and 2444, that added together give a palindrome (5445).

The spelling of 30012444 in words is "thirty million, twelve thousand, four hundred forty-four".