30041440 has 144 divisors (see below), whose sum is σ = 84668976. Its totient is φ = 9984000.

The previous prime is 30041423. The next prime is 30041441. The reversal of 30041440 is 4414003.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30041441) by changing a digit.

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, 297390 + ... + 297490.

It is an arithmetic number, because the mean of its divisors is an integer number (587979).

Almost surely, 2^30041440 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 30041440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42334488).

30041440 is an abundant number, since it is smaller than the sum of its proper divisors (54627536).

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

30041440 is a wasteful number, since it uses less digits than its factorization.

30041440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 30041440 is about 5481.0072067094. The cubic root of 30041440 is about 310.8662555642.

Adding to 30041440 its reverse (4414003), we get a palindrome (34455443).

It can be divided in two parts, 3004 and 1440, that added together give a palindrome (4444).

The spelling of 30041440 in words is "thirty million, forty-one thousand, four hundred forty".