1224660420 has 36 divisors (see below), whose sum is σ = 3714803820. Its totient is φ = 326576064.

The previous prime is 1224660419. The next prime is 1224660431. The reversal of 1224660420 is 240664221.

1224660420 is a `hidden beast` number, since 12 + 2 + 46 + 604 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 166719744 + 1057940676 = 12912^2 + 32526^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3401655 + ... + 3402014.

It is an arithmetic number, because the mean of its divisors is an integer number (103188995).

Almost surely, 2^1224660420 is an apocalyptic number.

1224660420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224660420 is an abundant number, since it is smaller than the sum of its proper divisors (2490143400).

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

1224660420 is a wasteful number, since it uses less digits than its factorization.

1224660420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6803684 (or 6803679 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1224660420 is about 34995.1485209022. The cubic root of 1224660420 is about 1069.8886016731. Note that the first 3 decimals are identical.

The spelling of 1224660420 in words is "one billion, two hundred twenty-four million, six hundred sixty thousand, four hundred twenty".