728914405 has 8 divisors (see below), whose sum is σ = 874944000. Its totient is φ = 582967056.

The previous prime is 728914387. The next prime is 728914409. The reversal of 728914405 is 504419827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728914405 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728914409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996 + ... + 38194.

It is an arithmetic number, because the mean of its divisors is an integer number (109368000).

Almost surely, 2^728914405 is an apocalyptic number.

It is an amenable number.

728914405 is a deficient number, since it is larger than the sum of its proper divisors (146029595).

728914405 is a wasteful number, since it uses less digits than its factorization.

728914405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41123.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 728914405 is about 26998.4148608766. The cubic root of 728914405 is about 899.9647743415.

The spelling of 728914405 in words is "seven hundred twenty-eight million, nine hundred fourteen thousand, four hundred five".