1240636224 has 112 divisors (see below), whose sum is σ = 3347435520. Its totient is φ = 405450240.

The previous prime is 1240636219. The next prime is 1240636259. The reversal of 1240636224 is 4226360421.

It is a super-3 number, since 3×1240636224³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1240636191 and 1240636200.

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, 3989029 + ... + 3989339.

Almost surely, 2^1240636224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240636224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673717760).

1240636224 is an abundant number, since it is smaller than the sum of its proper divisors (2106799296).

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

1240636224 is a wasteful number, since it uses less digits than its factorization.

1240636224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 1240636224 is about 35222.6663385951. Note that the first 3 decimals coincide. The cubic root of 1240636224 is about 1074.5207812473.

Adding to 1240636224 its reverse (4226360421), we get a palindrome (5466996645).

The spelling of 1240636224 in words is "one billion, two hundred forty million, six hundred thirty-six thousand, two hundred twenty-four".