531726336 has 128 divisors (see below), whose sum is σ = 1578082800. Its totient is φ = 176947200.

The previous prime is 531726311. The next prime is 531726337. The reversal of 531726336 is 633627135.

531726336 is a `hidden beast` number, since 5 + 3 + 17 + 2 + 633 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 531726336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531726337) 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, 884436 + ... + 885036.

Almost surely, 2^531726336 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 531726336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789041400).

531726336 is an abundant number, since it is smaller than the sum of its proper divisors (1046356464).

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

531726336 is an frugal number, since it uses more digits than its factorization.

531726336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 606 counting only the distinct ones).

The product of its digits is 68040, while the sum is 36.

The square root of 531726336 is about 23059.1920066597. The cubic root of 531726336 is about 810.1449397697.

The spelling of 531726336 in words is "five hundred thirty-one million, seven hundred twenty-six thousand, three hundred thirty-six".