1001347440 has 80 divisors (see below), whose sum is σ = 3124847616. Its totient is φ = 265248000.

The previous prime is 1001347433. The next prime is 1001347453. The reversal of 1001347440 is 447431001.

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 (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1001347440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22425 + ... + 50055.

Almost surely, 2^1001347440 is an apocalyptic number.

1001347440 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 1001347440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562423808).

1001347440 is an abundant number, since it is smaller than the sum of its proper divisors (2123500176).

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

1001347440 is a wasteful number, since it uses less digits than its factorization.

1001347440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27798 (or 27792 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1001347440 is about 31644.0743267993. The cubic root of 1001347440 is about 1000.4489450848.

Adding to 1001347440 its reverse (447431001), we get a palindrome (1448778441).

The spelling of 1001347440 in words is "one billion, one million, three hundred forty-seven thousand, four hundred forty".