1001440938 has 16 divisors (see below), whose sum is σ = 2045496960. Its totient is φ = 326711136.

The previous prime is 1001440933. The next prime is 1001440939. The reversal of 1001440938 is 8390441001.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1001440933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1775323 + ... + 1775886.

It is an arithmetic number, because the mean of its divisors is an integer number (127843560).

Almost surely, 2^1001440938 is an apocalyptic number.

1001440938 is an abundant number, since it is smaller than the sum of its proper divisors (1044056022).

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

1001440938 is a wasteful number, since it uses less digits than its factorization.

1001440938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3551261.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1001440938 is about 31645.5516305215. The cubic root of 1001440938 is about 1000.4800821509.

Adding to 1001440938 its reverse (8390441001), we get a palindrome (9391881939).

The spelling of 1001440938 in words is "one billion, one million, four hundred forty thousand, nine hundred thirty-eight".