1224645444 has 36 divisors (see below), whose sum is σ = 3377053680. Its totient is φ = 371104560.

The previous prime is 1224645413. The next prime is 1224645449. The reversal of 1224645444 is 4445464221.

1224645444 is a `hidden beast` number, since 1 + 2 + 2 + 4 + 645 + 4 + 4 + 4 = 666.

1224645444 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1224645399 and 1224645408.

It is not an unprimeable number, because it can be changed into a prime (1224645449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1545874 + ... + 1546665.

Almost surely, 2^1224645444 is an apocalyptic number.

It is an amenable number.

1224645444 is an abundant number, since it is smaller than the sum of its proper divisors (2152408236).

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

1224645444 is a wasteful number, since it uses less digits than its factorization.

1224645444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3092560 (or 3092555 counting only the distinct ones).

The product of its digits is 122880, while the sum is 36.

The square root of 1224645444 is about 34994.9345477313. The cubic root of 1224645444 is about 1069.8842405412.

The spelling of 1224645444 in words is "one billion, two hundred twenty-four million, six hundred forty-five thousand, four hundred forty-four".