12210438 has 16 divisors (see below), whose sum is σ = 24765696. Its totient is φ = 4012680.

The previous prime is 12210389. The next prime is 12210449. The reversal of 12210438 is 83401221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13906 + ... + 14757.

It is an arithmetic number, because the mean of its divisors is an integer number (1547856).

Almost surely, 2^12210438 is an apocalyptic number.

12210438 is an abundant number, since it is smaller than the sum of its proper divisors (12555258).

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

12210438 is a wasteful number, since it uses less digits than its factorization.

12210438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28739.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 12210438 is about 3494.3437152060. The cubic root of 12210438 is about 230.2733863195.

Adding to 12210438 its reverse (83401221), we get a palindrome (95611659).

The spelling of 12210438 in words is "twelve million, two hundred ten thousand, four hundred thirty-eight".