30218236 has 12 divisors (see below), whose sum is σ = 53110512. Its totient is φ = 15043808.

The previous prime is 30218213. The next prime is 30218249. The reversal of 30218236 is 63281203.

It is a self number, because there is not a number n which added to its sum of digits gives 30218236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15280 + ... + 17143.

It is an arithmetic number, because the mean of its divisors is an integer number (4425876).

Almost surely, 2^30218236 is an apocalyptic number.

It is an amenable number.

30218236 is a deficient number, since it is larger than the sum of its proper divisors (22892276).

30218236 is a wasteful number, since it uses less digits than its factorization.

30218236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32660 (or 32658 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 30218236 is about 5497.1116051978. Note that the first 3 decimals coincide. The cubic root of 30218236 is about 311.4748864789.

Adding to 30218236 its reverse (63281203), we get a palindrome (93499439).

The spelling of 30218236 in words is "thirty million, two hundred eighteen thousand, two hundred thirty-six".