531686040 has 64 divisors (see below), whose sum is σ = 1606750560. Its totient is φ = 140743680.

The previous prime is 531686039. The next prime is 531686047. The reversal of 531686040 is 40686135.

It is a junction number, because it is equal to n+sod(n) for n = 531685992 and 531686010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531686047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270 + ... + 32610.

Almost surely, 2^531686040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531686040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803375280).

531686040 is an abundant number, since it is smaller than the sum of its proper divisors (1075064520).

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

531686040 is a wasteful number, since it uses less digits than its factorization.

531686040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32492 (or 32488 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 531686040 is about 23058.3182387615. The cubic root of 531686040 is about 810.1244740884.

The spelling of 531686040 in words is "five hundred thirty-one million, six hundred eighty-six thousand, forty".