30144140 has 48 divisors (see below), whose sum is σ = 68584320. Its totient is φ = 11063040.

The previous prime is 30144139. The next prime is 30144173. The reversal of 30144140 is 4144103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69725 + ... + 70155.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^30144140 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 30144140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34292160).

30144140 is an abundant number, since it is smaller than the sum of its proper divisors (38440180).

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

30144140 is a wasteful number, since it uses less digits than its factorization.

30144140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 30144140 is about 5490.3679293832. The cubic root of 30144140 is about 311.2200962652.

Adding to 30144140 its reverse (4144103), we get a palindrome (34288243).

The spelling of 30144140 in words is "thirty million, one hundred forty-four thousand, one hundred forty".