12220538 has 16 divisors (see below), whose sum is σ = 20195136. Its totient is φ = 5499840.

The previous prime is 12220531. The next prime is 12220543. The reversal of 12220538 is 83502221.

It is not an unprimeable number, because it can be changed into a prime (12220531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431 + ... + 4962.

It is an arithmetic number, because the mean of its divisors is an integer number (1262196).

Almost surely, 2^12220538 is an apocalyptic number.

12220538 is a deficient number, since it is larger than the sum of its proper divisors (7974598).

12220538 is a wasteful number, since it uses less digits than its factorization.

12220538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 12220538 is about 3495.7886091696. The cubic root of 12220538 is about 230.3368598885.

Adding to 12220538 its reverse (83502221), we get a palindrome (95722759).

The spelling of 12220538 in words is "twelve million, two hundred twenty thousand, five hundred thirty-eight".