12420288 has 42 divisors (see below), whose sum is σ = 35602164. Its totient is φ = 4139904.

The previous prime is 12420277. The next prime is 12420311. The reversal of 12420288 is 88202421.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10206 + ... + 11357.

Almost surely, 2^12420288 is an apocalyptic number.

12420288 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12420288 is an abundant number, since it is smaller than the sum of its proper divisors (23181876).

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

12420288 is a wasteful number, since it uses less digits than its factorization.

12420288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21581 (or 21568 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 12420288 is about 3524.2428974178. The cubic root of 12420288 is about 231.5850688827.

The spelling of 12420288 in words is "twelve million, four hundred twenty thousand, two hundred eighty-eight".