30861393 has 8 divisors (see below), whose sum is σ = 41174688. Its totient is φ = 20561184.

The previous prime is 30861359. The next prime is 30861431. The reversal of 30861393 is 39316803.

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

It is not a de Polignac number, because 30861393 - 2⁶ = 30861329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30861323) by changing a digit.

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, 5946 + ... + 9852.

It is an arithmetic number, because the mean of its divisors is an integer number (5146836).

Almost surely, 2^30861393 is an apocalyptic number.

It is an amenable number.

30861393 is a deficient number, since it is larger than the sum of its proper divisors (10313295).

30861393 is a wasteful number, since it uses less digits than its factorization.

30861393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6543.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 30861393 is about 5555.3031420436. The cubic root of 30861393 is about 313.6691750134.

The spelling of 30861393 in words is "thirty million, eight hundred sixty-one thousand, three hundred ninety-three".