30172056 has 32 divisors (see below), whose sum is σ = 75724800. Its totient is φ = 10018080.

The previous prime is 30172039. The next prime is 30172063. The reversal of 30172056 is 65027103.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4185 + ... + 8823.

It is an arithmetic number, because the mean of its divisors is an integer number (2366400).

Almost surely, 2^30172056 is an apocalyptic number.

It is an amenable number.

30172056 is an abundant number, since it is smaller than the sum of its proper divisors (45552744).

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

30172056 is a wasteful number, since it uses less digits than its factorization.

30172056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4919 (or 4915 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 30172056 is about 5492.9096114901. The cubic root of 30172056 is about 311.3161385877.

Adding to 30172056 its reverse (65027103), we get a palindrome (95199159).

The spelling of 30172056 in words is "thirty million, one hundred seventy-two thousand, fifty-six".