30972238 has 8 divisors (see below), whose sum is σ = 50681880. Its totient is φ = 14078280.

The previous prime is 30972233. The next prime is 30972257. The reversal of 30972238 is 83227903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30972233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703893 + ... + 703936.

It is an arithmetic number, because the mean of its divisors is an integer number (6335235).

Almost surely, 2^30972238 is an apocalyptic number.

30972238 is a deficient number, since it is larger than the sum of its proper divisors (19709642).

30972238 is a wasteful number, since it uses less digits than its factorization.

30972238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407842.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 30972238 is about 5565.2707032093. The cubic root of 30972238 is about 314.0442619526.

It can be divided in two parts, 3097 and 2238, that added together give a palindrome (5335).

The spelling of 30972238 in words is "thirty million, nine hundred seventy-two thousand, two hundred thirty-eight".