30797280 has 96 divisors (see below), whose sum is σ = 107805600. Its totient is φ = 8211456.

The previous prime is 30797269. The next prime is 30797297. The reversal of 30797280 is 8279703.

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

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

It is a congruent number.

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, 756 + ... + 7884.

It is an arithmetic number, because the mean of its divisors is an integer number (1122975).

Almost surely, 2^30797280 is an apocalyptic number.

30797280 is a gapful number since it is divisible by the number (30) 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 30797280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53902800).

30797280 is an abundant number, since it is smaller than the sum of its proper divisors (77008320).

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

30797280 is a wasteful number, since it uses less digits than its factorization.

30797280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7153 (or 7139 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 30797280 is about 5549.5297098042. The cubic root of 30797280 is about 313.4518137519.

The spelling of 30797280 in words is "thirty million, seven hundred ninety-seven thousand, two hundred eighty".