1240244040 has 128 divisors (see below), whose sum is σ = 4260936960. Its totient is φ = 282906624.

The previous prime is 1240244029. The next prime is 1240244059. The reversal of 1240244040 is 404420421.

1240244040 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1240243998 and 1240244016.

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, 517084 + ... + 519476.

It is an arithmetic number, because the mean of its divisors is an integer number (33288570).

Almost surely, 2^1240244040 is an apocalyptic number.

1240244040 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 1240244040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2130468480).

1240244040 is an abundant number, since it is smaller than the sum of its proper divisors (3020692920).

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

1240244040 is a wasteful number, since it uses less digits than its factorization.

1240244040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031 (or 3027 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 1240244040 is about 35217.0986879953. The cubic root of 1240244040 is about 1074.4075451882.

Adding to 1240244040 its reverse (404420421), we get a palindrome (1644664461).

The spelling of 1240244040 in words is "one billion, two hundred forty million, two hundred forty-four thousand, forty".