30231236 has 72 divisors (see below), whose sum is σ = 66993696. Its totient is φ = 11854080.

The previous prime is 30231209. The next prime is 30231239. The reversal of 30231236 is 63213203.

It is not an unprimeable number, because it can be changed into a prime (30231239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143171 + ... + 143381.

It is an arithmetic number, because the mean of its divisors is an integer number (930468).

Almost surely, 2^30231236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30231236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33496848).

30231236 is an abundant number, since it is smaller than the sum of its proper divisors (36762460).

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

30231236 is a wasteful number, since it uses less digits than its factorization.

30231236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 30231236 is about 5498.2939172074. The cubic root of 30231236 is about 311.5195459687.

Adding to 30231236 its reverse (63213203), we get a palindrome (93444439).

The spelling of 30231236 in words is "thirty million, two hundred thirty-one thousand, two hundred thirty-six".