1240844220 has 144 divisors (see below), whose sum is σ = 4692699648. Its totient is φ = 257834880.

The previous prime is 1240844219. The next prime is 1240844237. The reversal of 1240844220 is 224480421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30904 + ... + 58623.

It is an arithmetic number, because the mean of its divisors is an integer number (32588192).

Almost surely, 2^1240844220 is an apocalyptic number.

1240844220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240844220 is an abundant number, since it is smaller than the sum of its proper divisors (3451855428).

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

1240844220 is a wasteful number, since it uses less digits than its factorization.

1240844220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89560 (or 89555 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 1240844220 is about 35225.6188022297. The cubic root of 1240844220 is about 1074.5808266583.

The spelling of 1240844220 in words is "one billion, two hundred forty million, eight hundred forty-four thousand, two hundred twenty".