30156172 has 12 divisors (see below), whose sum is σ = 54593280. Its totient is φ = 14558096.

The previous prime is 30156157. The next prime is 30156179. The reversal of 30156172 is 27165103.

It is not an unprimeable number, because it can be changed into a prime (30156179) 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 3 ways as a sum of consecutive naturals, for example, 129868 + ... + 130099.

It is an arithmetic number, because the mean of its divisors is an integer number (4549440).

Almost surely, 2^30156172 is an apocalyptic number.

It is an amenable number.

30156172 is a deficient number, since it is larger than the sum of its proper divisors (24437108).

30156172 is a wasteful number, since it uses less digits than its factorization.

30156172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260000 (or 259998 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 30156172 is about 5491.4635571949. The cubic root of 30156172 is about 311.2614984758.

The spelling of 30156172 in words is "thirty million, one hundred fifty-six thousand, one hundred seventy-two".