1240112640 has 160 divisors (see below), whose sum is σ = 4269789216. Its totient is φ = 305233920.

The previous prime is 1240112611. The next prime is 1240112641. The reversal of 1240112640 is 462110421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240112641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93630 + ... + 106050.

Almost surely, 2^1240112640 is an apocalyptic number.

1240112640 is a gapful number since it is divisible by the number (10) 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 1240112640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2134894608).

1240112640 is an abundant number, since it is smaller than the sum of its proper divisors (3029676576).

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

1240112640 is a wasteful number, since it uses less digits than its factorization.

1240112640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12460 (or 12444 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1240112640 is about 35215.2330675235. The cubic root of 1240112640 is about 1074.3696004684.

The spelling of 1240112640 in words is "one billion, two hundred forty million, one hundred twelve thousand, six hundred forty".