531685386 has 12 divisors (see below), whose sum is σ = 1151985042. Its totient is φ = 177228456.

The previous prime is 531685381. The next prime is 531685409. The reversal of 531685386 is 683586135.

531685386 is a `hidden beast` number, since 53 + 1 + 68 + 538 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 509359761 + 22325625 = 22569^2 + 4725^2 .

It is not an unprimeable number, because it can be changed into a prime (531685381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14769021 + ... + 14769056.

Almost surely, 2^531685386 is an apocalyptic number.

531685386 is an abundant number, since it is smaller than the sum of its proper divisors (620299656).

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

531685386 is a wasteful number, since it uses less digits than its factorization.

531685386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29538085 (or 29538082 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 531685386 is about 23058.3040573239. The cubic root of 531685386 is about 810.1241419239.

The spelling of 531685386 in words is "five hundred thirty-one million, six hundred eighty-five thousand, three hundred eighty-six".