30172288 has 32 divisors (see below), whose sum is σ = 60698160. Its totient is φ = 14938368.

The previous prime is 30172273. The next prime is 30172291. The reversal of 30172288 is 88227103.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12595 + ... + 14797.

Almost surely, 2^30172288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30172288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30349080).

30172288 is an abundant number, since it is smaller than the sum of its proper divisors (30525872).

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

30172288 is a wasteful number, since it uses less digits than its factorization.

30172288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 30172288 is about 5492.9307295833. The cubic root of 30172288 is about 311.3169365132.

The spelling of 30172288 in words is "thirty million, one hundred seventy-two thousand, two hundred eighty-eight".