1224402420 has 48 divisors (see below), whose sum is σ = 3430582848. Its totient is φ = 326292480.

The previous prime is 1224402419. The next prime is 1224402433. The reversal of 1224402420 is 242044221.

It is a super-2 number, since 2×1224402420² = 2998322572203712800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98980 + ... + 110660.

It is an arithmetic number, because the mean of its divisors is an integer number (71470476).

Almost surely, 2^1224402420 is an apocalyptic number.

1224402420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224402420 is an abundant number, since it is smaller than the sum of its proper divisors (2206180428).

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

1224402420 is a wasteful number, since it uses less digits than its factorization.

1224402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13440 (or 13438 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 1224402420 is about 34991.4621014898. The cubic root of 1224402420 is about 1069.8134650227.

Adding to 1224402420 its reverse (242044221), we get a palindrome (1466446641).

The spelling of 1224402420 in words is "one billion, two hundred twenty-four million, four hundred two thousand, four hundred twenty".