728923071 has 8 divisors (see below), whose sum is σ = 972031104. Its totient is φ = 485881880.

The previous prime is 728923067. The next prime is 728923073. The reversal of 728923071 is 170329827.

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

It is a cyclic number.

It is not a de Polignac number, because 728923071 - 2² = 728923067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728923073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20710 + ... + 43436.

It is an arithmetic number, because the mean of its divisors is an integer number (121503888).

Almost surely, 2^728923071 is an apocalyptic number.

728923071 is a deficient number, since it is larger than the sum of its proper divisors (243108033).

728923071 is a wasteful number, since it uses less digits than its factorization.

728923071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33421.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 728923071 is about 26998.5753513033. The cubic root of 728923071 is about 899.9683408617.

The spelling of 728923071 in words is "seven hundred twenty-eight million, nine hundred twenty-three thousand, seventy-one".