30040172 has 12 divisors (see below), whose sum is σ = 54383280. Its totient is φ = 14502096.

The previous prime is 30040169. The next prime is 30040177. The reversal of 30040172 is 27104003.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 30040172.

It is not an unprimeable number, because it can be changed into a prime (30040177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129368 + ... + 129599.

It is an arithmetic number, because the mean of its divisors is an integer number (4531940).

Almost surely, 2^30040172 is an apocalyptic number.

It is an amenable number.

30040172 is a deficient number, since it is larger than the sum of its proper divisors (24343108).

30040172 is a wasteful number, since it uses less digits than its factorization.

30040172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259000 (or 258998 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 30040172 is about 5480.8915333183. The cubic root of 30040172 is about 310.8618817841.

Adding to 30040172 its reverse (27104003), we get a palindrome (57144175).

The spelling of 30040172 in words is "thirty million, forty thousand, one hundred seventy-two".