728543437 has 4 divisors (see below), whose sum is σ = 728724096. Its totient is φ = 728362780.

The previous prime is 728543399. The next prime is 728543443. The reversal of 728543437 is 734345827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728543437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728543393 and 728543402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728543237) 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, 84139 + ... + 92392.

It is an arithmetic number, because the mean of its divisors is an integer number (182181024).

Almost surely, 2^728543437 is an apocalyptic number.

It is an amenable number.

728543437 is a deficient number, since it is larger than the sum of its proper divisors (180659).

728543437 is a wasteful number, since it uses less digits than its factorization.

728543437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180658.

The product of its digits is 564480, while the sum is 43.

The square root of 728543437 is about 26991.5438054217. The cubic root of 728543437 is about 899.8120747546.

The spelling of 728543437 in words is "seven hundred twenty-eight million, five hundred forty-three thousand, four hundred thirty-seven".