728260664 has 8 divisors (see below), whose sum is σ = 1365488760. Its totient is φ = 364130328.

The previous prime is 728260657. The next prime is 728260693. The reversal of 728260664 is 466062827.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45516284 + ... + 45516299.

It is an arithmetic number, because the mean of its divisors is an integer number (170686095).

Almost surely, 2^728260664 is an apocalyptic number.

It is an amenable number.

728260664 is a deficient number, since it is larger than the sum of its proper divisors (637228096).

728260664 is a wasteful number, since it uses less digits than its factorization.

728260664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91032589 (or 91032585 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 728260664 is about 26986.3051194490. The cubic root of 728260664 is about 899.6956435883.

The spelling of 728260664 in words is "seven hundred twenty-eight million, two hundred sixty thousand, six hundred sixty-four".