30797712 has 80 divisors (see below), whose sum is σ = 96452160. Its totient is φ = 9331200.

The previous prime is 30797699. The next prime is 30797719. The reversal of 30797712 is 21779703.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (30797719) 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, 1512 + ... + 7992.

It is an arithmetic number, because the mean of its divisors is an integer number (1205652).

Almost surely, 2^30797712 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 30797712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48226080).

30797712 is an abundant number, since it is smaller than the sum of its proper divisors (65654448).

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

30797712 is a wasteful number, since it uses less digits than its factorization.

30797712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509 (or 6497 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 30797712 is about 5549.5686318848. The cubic root of 30797712 is about 313.4532793635.

Subtracting from 30797712 its reverse (21779703), we obtain a square (9018009 = 3003²).

The spelling of 30797712 in words is "thirty million, seven hundred ninety-seven thousand, seven hundred twelve".