30808172 has 24 divisors (see below), whose sum is σ = 56579712. Its totient is φ = 14659200.

The previous prime is 30808163. The next prime is 30808181. The reversal of 30808172 is 27180803.

It is an interprime number because it is at equal distance from previous prime (30808163) and next prime (30808181).

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

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, 5528 + ... + 9600.

It is an arithmetic number, because the mean of its divisors is an integer number (2357488).

Almost surely, 2^30808172 is an apocalyptic number.

It is an amenable number.

30808172 is a deficient number, since it is larger than the sum of its proper divisors (25771540).

30808172 is a wasteful number, since it uses less digits than its factorization.

30808172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4169 (or 4167 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 30808172 is about 5550.5109674696. The cubic root of 30808172 is about 313.4887619796.

Adding to 30808172 its reverse (27180803), we get a palindrome (57988975).

The spelling of 30808172 in words is "thirty million, eight hundred eight thousand, one hundred seventy-two".