1244681040 has 80 divisors (see below), whose sum is σ = 3882305088. Its totient is φ = 329868288.

The previous prime is 1244681033. The next prime is 1244681057. The reversal of 1244681040 is 401864421.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1244680989 and 1244681007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23212 + ... + 55028.

Almost surely, 2^1244681040 is an apocalyptic number.

1244681040 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 1244681040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1941152544).

1244681040 is an abundant number, since it is smaller than the sum of its proper divisors (2637624048).

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

1244681040 is a wasteful number, since it uses less digits than its factorization.

1244681040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31996 (or 31990 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 1244681040 is about 35280.0374149461. The cubic root of 1244681040 is about 1075.6872591100.

The spelling of 1244681040 in words is "one billion, two hundred forty-four million, six hundred eighty-one thousand, forty".