1224481536 has 90 divisors (see below), whose sum is σ = 3651244212. Its totient is φ = 408153600.

The previous prime is 1224481519. The next prime is 1224481561. The reversal of 1224481536 is 6351844221.

It is a happy number.

1224481536 is a `hidden beast` number, since 1 + 2 + 2 + 44 + 81 + 536 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1224481536.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8790 + ... + 50261.

Almost surely, 2^1224481536 is an apocalyptic number.

1224481536 is a gapful number since it is divisible by the number (16) 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 1224481536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1825622106).

1224481536 is an abundant number, since it is smaller than the sum of its proper divisors (2426762676).

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

1224481536 is an frugal number, since it uses more digits than its factorization.

1224481536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59079 (or 59056 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 1224481536 is about 34992.5925875749. The cubic root of 1224481536 is about 1069.8365068859.

The spelling of 1224481536 in words is "one billion, two hundred twenty-four million, four hundred eighty-one thousand, five hundred thirty-six".