731438 has 8 divisors (see below), whose sum is σ = 1135080. Its totient is φ = 353080.

The previous prime is 731413. The next prime is 731447. The reversal of 731438 is 834137.

731438 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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6248 + ... + 6363.

It is an arithmetic number, because the mean of its divisors is an integer number (141885).

2⁷³¹⁴³⁸ is an apocalyptic number.

731438 is a deficient number, since it is larger than the sum of its proper divisors (403642).

731438 is a wasteful number, since it uses less digits than its factorization.

731438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12642.

The product of its digits is 2016, while the sum is 26.

The square root of 731438 is about 855.2414863651. The cubic root of 731438 is about 90.1002175815.

The spelling of 731438 in words is "seven hundred thirty-one thousand, four hundred thirty-eight".