30172242 has 16 divisors (see below), whose sum is σ = 61975872. Its totient is φ = 9785520.

The previous prime is 30172237. The next prime is 30172249. The reversal of 30172242 is 24227103.

It is not an unprimeable number, because it can be changed into a prime (30172249) 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 7 ways as a sum of consecutive naturals, for example, 67734 + ... + 68177.

It is an arithmetic number, because the mean of its divisors is an integer number (3873492).

Almost surely, 2^30172242 is an apocalyptic number.

30172242 is an abundant number, since it is smaller than the sum of its proper divisors (31803630).

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

30172242 is a wasteful number, since it uses less digits than its factorization.

30172242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135953.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 30172242 is about 5492.9265423816. The cubic root of 30172242 is about 311.3167783041.

Adding to 30172242 its reverse (24227103), we get a palindrome (54399345).

The spelling of 30172242 in words is "thirty million, one hundred seventy-two thousand, two hundred forty-two".