30793638 has 8 divisors (see below), whose sum is σ = 61587288. Its totient is φ = 10264544.

The previous prime is 30793597. The next prime is 30793639. The reversal of 30793638 is 83639703.

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

30793638 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 30793596 and 30793605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30793639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2566131 + ... + 2566142.

It is an arithmetic number, because the mean of its divisors is an integer number (7698411).

Almost surely, 2^30793638 is an apocalyptic number.

30793638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30793638 is a wasteful number, since it uses less digits than its factorization.

30793638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132278.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 30793638 is about 5549.2015641892. The cubic root of 30793638 is about 313.4394572872.

The spelling of 30793638 in words is "thirty million, seven hundred ninety-three thousand, six hundred thirty-eight".