1224435420 has 144 divisors (see below), whose sum is σ = 4125229920. Its totient is φ = 301377024.

The previous prime is 1224435409. The next prime is 1224435451. The reversal of 1224435420 is 245344221.

1224435420 is a `hidden beast` number, since 1 + 224 + 435 + 4 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84552 + ... + 97968.

It is an arithmetic number, because the mean of its divisors is an integer number (28647430).

Almost surely, 2^1224435420 is an apocalyptic number.

1224435420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1224435420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2062614960).

1224435420 is an abundant number, since it is smaller than the sum of its proper divisors (2900794500).

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

1224435420 is a wasteful number, since it uses less digits than its factorization.

1224435420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13461 (or 13440 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 1224435420 is about 34991.9336419124. The cubic root of 1224435420 is about 1069.8230761132.

Adding to 1224435420 its reverse (245344221), we get a palindrome (1469779641).

The spelling of 1224435420 in words is "one billion, two hundred twenty-four million, four hundred thirty-five thousand, four hundred twenty".