30818397 has 8 divisors (see below), whose sum is σ = 41122080. Its totient is φ = 20530160.

The previous prime is 30818369. The next prime is 30818407. The reversal of 30818397 is 79381803.

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 30818397 - 2⁷ = 30818269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30818197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2122 + ... + 8132.

It is an arithmetic number, because the mean of its divisors is an integer number (5140260).

Almost surely, 2^30818397 is an apocalyptic number.

It is an amenable number.

30818397 is a deficient number, since it is larger than the sum of its proper divisors (10303683).

30818397 is a wasteful number, since it uses less digits than its factorization.

30818397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7723.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 30818397 is about 5551.4319774271. The cubic root of 30818397 is about 313.5234396623.

The spelling of 30818397 in words is "thirty million, eight hundred eighteen thousand, three hundred ninety-seven".