531690 has 32 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 137664.

The previous prime is 531689. The next prime is 531701. The reversal of 531690 is 96135.

It is a super-2 number, since 2×531690² = 565388512200, which contains 22 as substring.

It is a d-powerful number, because it can be written as 5 + 3³ + 6³ + 1 + 9⁶ + 0 .

It is a self number, because there is not a number n which added to its sum of digits gives 531690.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 871 + ... + 1349.

It is an arithmetic number, because the mean of its divisors is an integer number (41040).

2⁵³¹⁶⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656640).

531690 is an abundant number, since it is smaller than the sum of its proper divisors (781590).

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

531690 is a wasteful number, since it uses less digits than its factorization.

531690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 531690 is about 729.1707618933. The cubic root of 531690 is about 81.0126485354.

It can be divided in two parts, 531 and 690, that added together give a palindrome (1221).

The spelling of 531690 in words is "five hundred thirty-one thousand, six hundred ninety".