30840172 has 24 divisors (see below), whose sum is σ = 59351040. Its totient is φ = 13905360.

The previous prime is 30840163. The next prime is 30840221. The reversal of 30840172 is 27104803.

It is a super-2 number, since 2×30840172² = 1902232417979168, which contains 22 as substring.

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, 2829 + ... + 8347.

It is an arithmetic number, because the mean of its divisors is an integer number (2472960).

Almost surely, 2^30840172 is an apocalyptic number.

It is an amenable number.

30840172 is a deficient number, since it is larger than the sum of its proper divisors (28510868).

30840172 is a wasteful number, since it uses less digits than its factorization.

30840172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5661 (or 5659 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 30840172 is about 5553.3928368161. The cubic root of 30840172 is about 313.5972631607.

Adding to 30840172 its reverse (27104803), we get a palindrome (57944975).

The spelling of 30840172 in words is "thirty million, eight hundred forty thousand, one hundred seventy-two".