30797472 has 96 divisors (see below), whose sum is σ = 86873472. Its totient is φ = 9519104.

The previous prime is 30797447. The next prime is 30797513. The reversal of 30797472 is 27479703.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 30797472.

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, 184333 + ... + 184499.

It is an arithmetic number, because the mean of its divisors is an integer number (904932).

Almost surely, 2^30797472 is an apocalyptic number.

30797472 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 30797472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43436736).

30797472 is an abundant number, since it is smaller than the sum of its proper divisors (56076000).

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

30797472 is a wasteful number, since it uses less digits than its factorization.

30797472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 39.

The square root of 30797472 is about 5549.5470085404. The cubic root of 30797472 is about 313.4524651365.

It can be divided in two parts, 307 and 97472, that added together give a palindrome (97779).

The spelling of 30797472 in words is "thirty million, seven hundred ninety-seven thousand, four hundred seventy-two".