1224144420 has 24 divisors (see below), whose sum is σ = 3427604544. Its totient is φ = 326438496.

The previous prime is 1224144379. The next prime is 1224144431. The reversal of 1224144420 is 244414221.

1224144420 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1224144420² = 2997059122034272800, which contains 22 as substring.

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, 10201144 + ... + 10201263.

It is an arithmetic number, because the mean of its divisors is an integer number (142816856).

Almost surely, 2^1224144420 is an apocalyptic number.

1224144420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224144420 is an abundant number, since it is smaller than the sum of its proper divisors (2203460124).

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

1224144420 is a wasteful number, since it uses less digits than its factorization.

1224144420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20402419 (or 20402417 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 1224144420 is about 34987.7752936651. The cubic root of 1224144420 is about 1069.7383178167.

Adding to 1224144420 its reverse (244414221), we get a palindrome (1468558641).

The spelling of 1224144420 in words is "one billion, two hundred twenty-four million, one hundred forty-four thousand, four hundred twenty".