531440023404 has 24 divisors (see below), whose sum is σ = 1240092822528. Its totient is φ = 177137231440.

The previous prime is 531440023403. The next prime is 531440023447. The reversal of 531440023404 is 404320044135.

It is not an unprimeable number, because it can be changed into a prime (531440023403) 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, 943992 + ... + 1397855.

It is an arithmetic number, because the mean of its divisors is an integer number (51670534272).

Almost surely, 2^531440023404 is an apocalyptic number.

It is an amenable number.

531440023404 is an abundant number, since it is smaller than the sum of its proper divisors (708652799124).

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

531440023404 is a wasteful number, since it uses less digits than its factorization.

531440023404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360765 (or 2360763 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 531440023404 its reverse (404320044135), we get a palindrome (935760067539).

The spelling of 531440023404 in words is "five hundred thirty-one billion, four hundred forty million, twenty-three thousand, four hundred four".