30905080 has 32 divisors (see below), whose sum is σ = 69724800. Its totient is φ = 12328576.

The previous prime is 30905059. The next prime is 30905087. The reversal of 30905080 is 8050903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30905087) 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, 18354 + ... + 19966.

It is an arithmetic number, because the mean of its divisors is an integer number (2178900).

Almost surely, 2^30905080 is an apocalyptic number.

It is an amenable number.

30905080 is an abundant number, since it is smaller than the sum of its proper divisors (38819720).

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

30905080 is a wasteful number, since it uses less digits than its factorization.

30905080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103 (or 2099 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 30905080 is about 5559.2337601508. The cubic root of 30905080 is about 313.8171139423.

Adding to 30905080 its reverse (8050903), we get a palindrome (38955983).

The spelling of 30905080 in words is "thirty million, nine hundred five thousand, eighty".