1040721344 has 28 divisors (see below), whose sum is σ = 2224043304. Its totient is φ = 480332544.

The previous prime is 1040721293. The next prime is 1040721349. The reversal of 1040721344 is 4431270401.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040721349) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 624602 + ... + 626265.

It is an arithmetic number, because the mean of its divisors is an integer number (79430118).

Almost surely, 2^1040721344 is an apocalyptic number.

It is an amenable number.

1040721344 is an abundant number, since it is smaller than the sum of its proper divisors (1183321960).

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

1040721344 is a wasteful number, since it uses less digits than its factorization.

1040721344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250892 (or 1250882 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 1040721344 is about 32260.2130185155. The cubic root of 1040721344 is about 1013.3935921383.

Adding to 1040721344 its reverse (4431270401), we get a palindrome (5471991745).

The spelling of 1040721344 in words is "one billion, forty million, seven hundred twenty-one thousand, three hundred forty-four".