30021144 has 32 divisors (see below), whose sum is σ = 77475840. Its totient is φ = 9684000.

The previous prime is 30021137. The next prime is 30021151. The reversal of 30021144 is 44112003.

It is an interprime number because it is at equal distance from previous prime (30021137) and next prime (30021151).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19432 + ... + 20919.

It is an arithmetic number, because the mean of its divisors is an integer number (2421120).

Almost surely, 2^30021144 is an apocalyptic number.

It is an amenable number.

30021144 is an abundant number, since it is smaller than the sum of its proper divisors (47454696).

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

30021144 is a wasteful number, since it uses less digits than its factorization.

30021144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40391 (or 40387 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 30021144 is about 5479.1554093674. The cubic root of 30021144 is about 310.7962327011.

Adding to 30021144 its reverse (44112003), we get a palindrome (74133147).

The spelling of 30021144 in words is "thirty million, twenty-one thousand, one hundred forty-four".