1240002312 has 128 divisors (see below), whose sum is σ = 3358713600. Its totient is φ = 380464128.

The previous prime is 1240002293. The next prime is 1240002341. The reversal of 1240002312 is 2132000421.

It is a junction number, because it is equal to n+sod(n) for n = 1240002291 and 1240002300.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2225938 + ... + 2226494.

It is an arithmetic number, because the mean of its divisors is an integer number (26239950).

Almost surely, 2^1240002312 is an apocalyptic number.

1240002312 is a gapful number since it is divisible by the number (12) 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 1240002312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679356800).

1240002312 is an abundant number, since it is smaller than the sum of its proper divisors (2118711288).

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

1240002312 is a wasteful number, since it uses less digits than its factorization.

1240002312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1240002312 is about 35213.6665514967. Note that the first 3 decimals coincide. The cubic root of 1240002312 is about 1074.3377386948.

Adding to 1240002312 its reverse (2132000421), we get a palindrome (3372002733).

The spelling of 1240002312 in words is "one billion, two hundred forty million, two thousand, three hundred twelve".