731985 has 8 divisors (see below), whose sum is σ = 1171200. Its totient is φ = 390384.

The previous prime is 731981. The next prime is 731999. The reversal of 731985 is 589137.

731985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 731985 - 2² = 731981 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 731985.

It is not an unprimeable number, because it can be changed into a prime (731981) 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, 24385 + ... + 24414.

It is an arithmetic number, because the mean of its divisors is an integer number (146400).

2⁷³¹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

731985 is a deficient number, since it is larger than the sum of its proper divisors (439215).

731985 is a wasteful number, since it uses less digits than its factorization.

731985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48807.

The product of its digits is 7560, while the sum is 33.

The square root of 731985 is about 855.5612193175. The cubic root of 731985 is about 90.1226722249.

The spelling of 731985 in words is "seven hundred thirty-one thousand, nine hundred eighty-five".