728326237 has 4 divisors (see below), whose sum is σ = 729033696. Its totient is φ = 727618780.

The previous prime is 728326231. The next prime is 728326279. The reversal of 728326237 is 732623827.

728326237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 728326237 - 2³ = 728326229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728326237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728326231) 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, 352183 + ... + 354244.

It is an arithmetic number, because the mean of its divisors is an integer number (182258424).

Almost surely, 2^728326237 is an apocalyptic number.

It is an amenable number.

728326237 is a deficient number, since it is larger than the sum of its proper divisors (707459).

728326237 is a wasteful number, since it uses less digits than its factorization.

728326237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707458.

The product of its digits is 169344, while the sum is 40.

The square root of 728326237 is about 26987.5200231514. The cubic root of 728326237 is about 899.7226458119.

The spelling of 728326237 in words is "seven hundred twenty-eight million, three hundred twenty-six thousand, two hundred thirty-seven".