731928 has 16 divisors (see below), whose sum is σ = 1829880. Its totient is φ = 243968.

The previous prime is 731923. The next prime is 731933. The reversal of 731928 is 829137.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (731923) and next prime (731933).

It is a junction number, because it is equal to n+sod(n) for n = 731895 and 731904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731921) 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, 15225 + ... + 15272.

2⁷³¹⁹²⁸ is an apocalyptic number.

It is an amenable number.

731928 is an abundant number, since it is smaller than the sum of its proper divisors (1097952).

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

731928 is a wasteful number, since it uses less digits than its factorization.

731928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30506 (or 30502 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 731928 is about 855.5279072012. The cubic root of 731928 is about 90.1203328666.

The spelling of 731928 in words is "seven hundred thirty-one thousand, nine hundred twenty-eight".