731436 has 12 divisors (see below), whose sum is σ = 1706712. Its totient is φ = 243808.

The previous prime is 731413. The next prime is 731447. The reversal of 731436 is 634137.

731436 is nontrivially palindromic in base 7.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

731436 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30465 + ... + 30488.

It is an arithmetic number, because the mean of its divisors is an integer number (142226).

2⁷³¹⁴³⁶ is an apocalyptic number.

It is an amenable number.

731436 is an abundant number, since it is smaller than the sum of its proper divisors (975276).

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

731436 is a wasteful number, since it uses less digits than its factorization.

731436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60960 (or 60958 counting only the distinct ones).

The product of its digits is 1512, while the sum is 24.

The square root of 731436 is about 855.2403171039. The cubic root of 731436 is about 90.1001354599.

The spelling of 731436 in words is "seven hundred thirty-one thousand, four hundred thirty-six".