728947965 has 16 divisors (see below), whose sum is σ = 1172836800. Its totient is φ = 386598912.

The previous prime is 728947951. The next prime is 728947969. The reversal of 728947965 is 569749827.

It is not a de Polignac number, because 728947965 - 2⁴ = 728947949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728947969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133060 + ... + 138429.

It is an arithmetic number, because the mean of its divisors is an integer number (73302300).

Almost surely, 2^728947965 is an apocalyptic number.

It is an amenable number.

728947965 is a deficient number, since it is larger than the sum of its proper divisors (443888835).

728947965 is a wasteful number, since it uses less digits than its factorization.

728947965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271676.

The product of its digits is 7620480, while the sum is 57.

The square root of 728947965 is about 26999.0363716930. The cubic root of 728947965 is about 899.9785859102.

The spelling of 728947965 in words is "seven hundred twenty-eight million, nine hundred forty-seven thousand, nine hundred sixty-five".