12238820 has 24 divisors (see below), whose sum is σ = 28038528. Its totient is φ = 4450400.

The previous prime is 12238799. The next prime is 12238843. The reversal of 12238820 is 2883221.

It is a self number, because there is not a number n which added to its sum of digits gives 12238820.

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, 27596 + ... + 28035.

It is an arithmetic number, because the mean of its divisors is an integer number (1168272).

Almost surely, 2^12238820 is an apocalyptic number.

12238820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12238820 is an abundant number, since it is smaller than the sum of its proper divisors (15799708).

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

12238820 is a wasteful number, since it uses less digits than its factorization.

12238820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55651 (or 55649 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 12238820 is about 3498.4024925671. The cubic root of 12238820 is about 230.4516644444.

It can be divided in two parts, 12 and 238820, that added together give a palindrome (238832).

The spelling of 12238820 in words is "twelve million, two hundred thirty-eight thousand, eight hundred twenty".