30904393 has 8 divisors (see below), whose sum is σ = 35033600. Its totient is φ = 27025488.

The previous prime is 30904337. The next prime is 30904397. The reversal of 30904393 is 39340903.

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 30904393 - 2²¹ = 28807241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30904397) 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, 62313 + ... + 62806.

It is an arithmetic number, because the mean of its divisors is an integer number (4379200).

Almost surely, 2^30904393 is an apocalyptic number.

It is an amenable number.

30904393 is a deficient number, since it is larger than the sum of its proper divisors (4129207).

30904393 is a wasteful number, since it uses less digits than its factorization.

30904393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125151.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 30904393 is about 5559.1719707165. The cubic root of 30904393 is about 313.8147886077.

It can be divided in two parts, 309043 and 93, that added together give a square (309136 = 556²).

The spelling of 30904393 in words is "thirty million, nine hundred four thousand, three hundred ninety-three".