728373945 has 24 divisors (see below), whose sum is σ = 1261944576. Its totient is φ = 358582848.

The previous prime is 728373901. The next prime is 728373991. The reversal of 728373945 is 549373827.

It is not a de Polignac number, because 728373945 - 2⁹ = 728373433 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 728373894 and 728373903.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141129 + ... + 146198.

It is an arithmetic number, because the mean of its divisors is an integer number (52581024).

Almost surely, 2^728373945 is an apocalyptic number.

It is an amenable number.

728373945 is a deficient number, since it is larger than the sum of its proper divisors (533570631).

728373945 is a wasteful number, since it uses less digits than its factorization.

728373945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287361 (or 287348 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 48.

The square root of 728373945 is about 26988.4038987118. The cubic root of 728373945 is about 899.7422904110.

The spelling of 728373945 in words is "seven hundred twenty-eight million, three hundred seventy-three thousand, nine hundred forty-five".