728501751 has 6 divisors (see below), whose sum is σ = 1052280320. Its totient is φ = 485667828.

The previous prime is 728501729. The next prime is 728501771. The reversal of 728501751 is 157105827.

It is not a de Polignac number, because 728501751 - 2⁶ = 728501687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728501771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40472311 + ... + 40472328.

Almost surely, 2^728501751 is an apocalyptic number.

728501751 is a deficient number, since it is larger than the sum of its proper divisors (323778569).

728501751 is a wasteful number, since it uses less digits than its factorization.

728501751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80944645 (or 80944642 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The square root of 728501751 is about 26990.7715895637. The cubic root of 728501751 is about 899.7949125285.

The spelling of 728501751 in words is "seven hundred twenty-eight million, five hundred one thousand, seven hundred fifty-one".