30820297 has 12 divisors (see below), whose sum is σ = 32417280. Its totient is φ = 29288016.

The previous prime is 30820277. The next prime is 30820313. The reversal of 30820297 is 79202803.

It is not a de Polignac number, because 30820297 - 2¹⁵ = 30787529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30820217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64104 + ... + 64582.

It is an arithmetic number, because the mean of its divisors is an integer number (2701440).

Almost surely, 2^30820297 is an apocalyptic number.

30820297 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

30820297 is a deficient number, since it is larger than the sum of its proper divisors (1596983).

30820297 is an equidigital number, since it uses as much as digits as its factorization.

30820297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 30820297 is about 5551.6031018076. The cubic root of 30820297 is about 313.5298825920.

The spelling of 30820297 in words is "thirty million, eight hundred twenty thousand, two hundred ninety-seven".