30505906 has 8 divisors (see below), whose sum is σ = 48167280. Its totient is φ = 14450148.

The previous prime is 30505901. The next prime is 30505957. The reversal of 30505906 is 60950503.

It is a happy number.

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

It is a super-2 number, since 2×30505906² = 1861220601761672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30505901) 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, 401356 + ... + 401431.

It is an arithmetic number, because the mean of its divisors is an integer number (6020910).

Almost surely, 2^30505906 is an apocalyptic number.

30505906 is a deficient number, since it is larger than the sum of its proper divisors (17661374).

30505906 is a wasteful number, since it uses less digits than its factorization.

30505906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802808.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 30505906 is about 5523.2151868273. The cubic root of 30505906 is about 312.4601540662.

The spelling of 30505906 in words is "thirty million, five hundred five thousand, nine hundred six".