731420 has 12 divisors (see below), whose sum is σ = 1536024. Its totient is φ = 292560.

The previous prime is 731413. The next prime is 731447. The reversal of 731420 is 24137.

It is a happy number.

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 731420.

It is an unprimeable number.

731420 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, 18266 + ... + 18305.

It is an arithmetic number, because the mean of its divisors is an integer number (128002).

2⁷³¹⁴²⁰ is an apocalyptic number.

It is an amenable number.

731420 is an abundant number, since it is smaller than the sum of its proper divisors (804604).

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

731420 is a wasteful number, since it uses less digits than its factorization.

731420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36580 (or 36578 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 731420 is about 855.2309629568. The cubic root of 731420 is about 90.0994784817.

Adding to 731420 its reverse (24137), we get a palindrome (755557).

The spelling of 731420 in words is "seven hundred thirty-one thousand, four hundred twenty".