30797988 has 24 divisors (see below), whose sum is σ = 77390208. Its totient is φ = 9476256.

The previous prime is 30797959. The next prime is 30798013. The reversal of 30797988 is 88979703.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 30797988.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98556 + ... + 98867.

It is an arithmetic number, because the mean of its divisors is an integer number (3224592).

Almost surely, 2^30797988 is an apocalyptic number.

It is an amenable number.

30797988 is an abundant number, since it is smaller than the sum of its proper divisors (46592220).

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

30797988 is a wasteful number, since it uses less digits than its factorization.

30797988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197443 (or 197441 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 30797988 is about 5549.5934986267. The cubic root of 30797988 is about 313.4542157192.

The spelling of 30797988 in words is "thirty million, seven hundred ninety-seven thousand, nine hundred eighty-eight".