30241440 has 72 divisors (see below), whose sum is σ = 103203828. Its totient is φ = 8064000.

The previous prime is 30241439. The next prime is 30241441. The reversal of 30241440 is 4414203.

It is an interprime number because it is at equal distance from previous prime (30241439) and next prime (30241441).

It can be written as a sum of positive squares in 2 ways, for example, as 28772496 + 1468944 = 5364^2 + 1212^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is not an unprimeable number, because it can be changed into a prime (30241441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9061 + ... + 11940.

Almost surely, 2^30241440 is an apocalyptic number.

30241440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30241440 is an abundant number, since it is smaller than the sum of its proper divisors (72962388).

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

30241440 is a wasteful number, since it uses less digits than its factorization.

30241440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21022 (or 21011 counting only the distinct ones).

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

The square root of 30241440 is about 5499.2217631225. The cubic root of 30241440 is about 311.5545912651.

Adding to 30241440 its reverse (4414203), we get a palindrome (34655643).

The spelling of 30241440 in words is "thirty million, two hundred forty-one thousand, four hundred forty".