30688397 has 8 divisors (see below), whose sum is σ = 31222080. Its totient is φ = 30157920.

The previous prime is 30688391. The next prime is 30688403. The reversal of 30688397 is 79388603.

It is an interprime number because it is at equal distance from previous prime (30688391) and next prime (30688403).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30688397 - 2¹⁰ = 30687373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30688391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25622 + ... + 26792.

It is an arithmetic number, because the mean of its divisors is an integer number (3902760).

Almost surely, 2^30688397 is an apocalyptic number.

It is an amenable number.

30688397 is a deficient number, since it is larger than the sum of its proper divisors (533683).

30688397 is a wasteful number, since it uses less digits than its factorization.

30688397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 30688397 is about 5539.7109130351. The cubic root of 30688397 is about 313.0819772551.

The spelling of 30688397 in words is "thirty million, six hundred eighty-eight thousand, three hundred ninety-seven".