30129908 has 12 divisors (see below), whose sum is σ = 55020000. Its totient is φ = 14409912.

The previous prime is 30129907. The next prime is 30129941. The reversal of 30129908 is 80992103.

It is a super-2 number, since 2×30129908² = 1815622712176928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30129907) 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, 163658 + ... + 163841.

It is an arithmetic number, because the mean of its divisors is an integer number (4585000).

Almost surely, 2^30129908 is an apocalyptic number.

It is an amenable number.

30129908 is a deficient number, since it is larger than the sum of its proper divisors (24890092).

30129908 is a wasteful number, since it uses less digits than its factorization.

30129908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327526 (or 327524 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 30129908 is about 5489.0716883641. The cubic root of 30129908 is about 311.1711096113.

The spelling of 30129908 in words is "thirty million, one hundred twenty-nine thousand, nine hundred eight".