731536 has 20 divisors (see below), whose sum is σ = 1526812. Its totient is φ = 337536.

The previous prime is 731531. The next prime is 731539. The reversal of 731536 is 635137.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 435600 + 295936 = 660^2 + 544^2 .

It is a super-3 number, since 3×731536³ = 1174433321046355968, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 731536.

It is not an unprimeable number, because it can be changed into a prime (731531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1551 + ... + 1966.

2⁷³¹⁵³⁶ is an apocalyptic number.

It is an amenable number.

731536 is an abundant number, since it is smaller than the sum of its proper divisors (795276).

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

731536 is a wasteful number, since it uses less digits than its factorization.

731536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538 (or 3532 counting only the distinct ones).

The product of its digits is 1890, while the sum is 25.

The square root of 731536 is about 855.2987782056. The cubic root of 731536 is about 90.1042413571.

The spelling of 731536 in words is "seven hundred thirty-one thousand, five hundred thirty-six".