731386 has 12 divisors (see below), whose sum is σ = 1159002. Its totient is φ = 346104.

The previous prime is 731369. The next prime is 731389. The reversal of 731386 is 683137.

It can be written as a sum of positive squares in only one way, i.e., 731025 + 361 = 855^2 + 19^2 .

It is not an unprimeable number, because it can be changed into a prime (731389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216 + ... + 1228.

2⁷³¹³⁸⁶ is an apocalyptic number.

731386 is a deficient number, since it is larger than the sum of its proper divisors (427616).

731386 is a wasteful number, since it uses less digits than its factorization.

731386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1034 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 731386 is about 855.2110850544. The cubic root of 731386 is about 90.0980823710.

The spelling of 731386 in words is "seven hundred thirty-one thousand, three hundred eighty-six".