30117472 has 96 divisors (see below), whose sum is σ = 78382080. Its totient is φ = 11028480.

The previous prime is 30117443. The next prime is 30117473. The reversal of 30117472 is 27471103.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30117473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41529 + ... + 42247.

It is an arithmetic number, because the mean of its divisors is an integer number (816480).

Almost surely, 2^30117472 is an apocalyptic number.

30117472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30117472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39191040).

30117472 is an abundant number, since it is smaller than the sum of its proper divisors (48264608).

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

30117472 is a wasteful number, since it uses less digits than its factorization.

30117472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 30117472 is about 5487.9387751687. The cubic root of 30117472 is about 311.1282921729.

Adding to 30117472 its reverse (27471103), we get a palindrome (57588575).

The spelling of 30117472 in words is "thirty million, one hundred seventeen thousand, four hundred seventy-two".