731456 has 28 divisors (see below), whose sum is σ = 1584960. Its totient is φ = 332160.

The previous prime is 731447. The next prime is 731483. The reversal of 731456 is 654137.

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 731456.

It is an unprimeable number.

731456 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185 + ... + 1223.

2⁷³¹⁴⁵⁶ 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 731456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792480).

731456 is an abundant number, since it is smaller than the sum of its proper divisors (853504).

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

731456 is a wasteful number, since it uses less digits than its factorization.

731456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1052 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 731456 is about 855.2520096439. The cubic root of 731456 is about 90.1009566693.

It can be divided in two parts, 731 and 456, that multiplied together give a triangular number (333336 = T₈₁₆).

The spelling of 731456 in words is "seven hundred thirty-one thousand, four hundred fifty-six".