728161041 has 4 divisors (see below), whose sum is σ = 970881392. Its totient is φ = 485440692.

The previous prime is 728161037. The next prime is 728161043. The reversal of 728161041 is 140161827.

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 not a de Polignac number, because 728161041 - 2² = 728161037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (728161043) 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, 121360171 + ... + 121360176.

It is an arithmetic number, because the mean of its divisors is an integer number (242720348).

Almost surely, 2^728161041 is an apocalyptic number.

It is an amenable number.

728161041 is a deficient number, since it is larger than the sum of its proper divisors (242720351).

728161041 is a wasteful number, since it uses less digits than its factorization.

728161041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242720350.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 728161041 is about 26984.4592497237. The cubic root of 728161041 is about 899.6546168558.

The spelling of 728161041 in words is "seven hundred twenty-eight million, one hundred sixty-one thousand, forty-one".