728730925 has 48 divisors (see below), whose sum is σ = 1055838672. Its totient is φ = 493977600.

The previous prime is 728730917. The next prime is 728730931. The reversal of 728730925 is 529037827.

It can be written as a sum of positive squares in 24 ways, for example, as 531440809 + 197290116 = 23053^2 + 14046^2 .

It is not a de Polignac number, because 728730925 - 2³ = 728730917 is a prime.

It is a super-2 number, since 2×728730925² = 1062097522102711250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 224917 + ... + 228133.

It is an arithmetic number, because the mean of its divisors is an integer number (21996639).

Almost surely, 2^728730925 is an apocalyptic number.

It is an amenable number.

728730925 is a deficient number, since it is larger than the sum of its proper divisors (327107747).

728730925 is a wasteful number, since it uses less digits than its factorization.

728730925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298 (or 3293 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 728730925 is about 26995.0166697485. The cubic root of 728730925 is about 899.8892559209.

The spelling of 728730925 in words is "seven hundred twenty-eight million, seven hundred thirty thousand, nine hundred twenty-five".