30636172 has 18 divisors (see below), whose sum is σ = 62366892. Its totient is φ = 13129704.

The previous prime is 30636169. The next prime is 30636181. The reversal of 30636172 is 27163603.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 30636172.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77958 + ... + 78349.

Almost surely, 2^30636172 is an apocalyptic number.

It is an amenable number.

30636172 is an abundant number, since it is smaller than the sum of its proper divisors (31730720).

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

30636172 is a wasteful number, since it uses less digits than its factorization.

30636172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156325 (or 156316 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 30636172 is about 5534.9952122834. The cubic root of 30636172 is about 312.9042771930.

Adding to 30636172 its reverse (27163603), we get a palindrome (57799775).

The spelling of 30636172 in words is "thirty million, six hundred thirty-six thousand, one hundred seventy-two".