728573015 has 4 divisors (see below), whose sum is σ = 874287624. Its totient is φ = 582858408.

The previous prime is 728573009. The next prime is 728573051. The reversal of 728573015 is 510375827.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 728573015 - 2²⁶ = 661464151 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 728573015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72857297 + ... + 72857306.

It is an arithmetic number, because the mean of its divisors is an integer number (218571906).

Almost surely, 2^728573015 is an apocalyptic number.

728573015 is a deficient number, since it is larger than the sum of its proper divisors (145714609).

728573015 is a wasteful number, since it uses less digits than its factorization.

728573015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145714608.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 728573015 is about 26992.0917122034. The cubic root of 728573015 is about 899.8242516911.

The spelling of 728573015 in words is "seven hundred twenty-eight million, five hundred seventy-three thousand, fifteen".