30805392 has 40 divisors (see below), whose sum is σ = 80485920. Its totient is φ = 10151680.

The previous prime is 30805387. The next prime is 30805393. The reversal of 30805392 is 29350803.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30805393) 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, 667 + ... + 7877.

It is an arithmetic number, because the mean of its divisors is an integer number (2012148).

Almost surely, 2^30805392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30805392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40242960).

30805392 is an abundant number, since it is smaller than the sum of its proper divisors (49680528).

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

30805392 is a wasteful number, since it uses less digits than its factorization.

30805392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7311 (or 7305 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 30805392 is about 5550.2605344254. The cubic root of 30805392 is about 313.4793323931.

The spelling of 30805392 in words is "thirty million, eight hundred five thousand, three hundred ninety-two".