12400022 has 8 divisors (see below), whose sum is σ = 18617376. Its totient is φ = 6194232.

The previous prime is 12400009. The next prime is 12400043. The reversal of 12400022 is 22000421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12399976 and 12400012.

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, 668 + ... + 5024.

It is an arithmetic number, because the mean of its divisors is an integer number (2327172).

Almost surely, 2^12400022 is an apocalyptic number.

12400022 is a deficient number, since it is larger than the sum of its proper divisors (6217354).

12400022 is a wasteful number, since it uses less digits than its factorization.

12400022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5782.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 12400022 is about 3521.3664961205. The cubic root of 12400022 is about 231.4590423368.

Adding to 12400022 its reverse (22000421), we get a palindrome (34400443).

The spelling of 12400022 in words is "twelve million, four hundred thousand, twenty-two".