728815325 has 24 divisors (see below), whose sum is σ = 1034100480. Its totient is φ = 499147200.

The previous prime is 728815291. The next prime is 728815333. The reversal of 728815325 is 523518827.

It is not a de Polignac number, because 728815325 - 2¹² = 728811229 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 176636 + ... + 180714.

It is an arithmetic number, because the mean of its divisors is an integer number (43087520).

Almost surely, 2^728815325 is an apocalyptic number.

It is an amenable number.

728815325 is a deficient number, since it is larger than the sum of its proper divisors (305285155).

728815325 is a wasteful number, since it uses less digits than its factorization.

728815325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117 (or 5112 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 728815325 is about 26996.5798759769. The cubic root of 728815325 is about 899.9239956393.

The spelling of 728815325 in words is "seven hundred twenty-eight million, eight hundred fifteen thousand, three hundred twenty-five".