30505308 has 12 divisors (see below), whose sum is σ = 71179080. Its totient is φ = 10168432.

The previous prime is 30505249. The next prime is 30505309. The reversal of 30505308 is 80350503.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30505309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271043 + ... + 1271066.

It is an arithmetic number, because the mean of its divisors is an integer number (5931590).

Almost surely, 2^30505308 is an apocalyptic number.

It is an amenable number.

30505308 is an abundant number, since it is smaller than the sum of its proper divisors (40673772).

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

30505308 is a wasteful number, since it uses less digits than its factorization.

30505308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542116 (or 2542114 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 30505308 is about 5523.1610514270. The cubic root of 30505308 is about 312.4581123589.

The spelling of 30505308 in words is "thirty million, five hundred five thousand, three hundred eight".