1001440940 has 24 divisors (see below), whose sum is σ = 2104099872. Its totient is φ = 400371840.

The previous prime is 1001440939. The next prime is 1001440969. The reversal of 1001440940 is 490441001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31025 + ... + 54455.

It is an arithmetic number, because the mean of its divisors is an integer number (87670828).

Almost surely, 2^1001440940 is an apocalyptic number.

1001440940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001440940 is an abundant number, since it is smaller than the sum of its proper divisors (1102658932).

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

1001440940 is a wasteful number, since it uses less digits than its factorization.

1001440940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25577 (or 25575 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1001440940 is about 31645.5516621215. The cubic root of 1001440940 is about 1000.4800828169.

Adding to 1001440940 its reverse (490441001), we get a palindrome (1491881941).

The spelling of 1001440940 in words is "one billion, one million, four hundred forty thousand, nine hundred forty".