728570406535 has 16 divisors (see below), whose sum is σ = 874830106080. Its totient is φ = 582492718080.

The previous prime is 728570406523. The next prime is 728570406539. The reversal of 728570406535 is 535604075827.

It is a happy number.

It is not a de Polignac number, because 728570406535 - 2¹¹ = 728570404487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728570406539) 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, 81281964 + ... + 81290926.

It is an arithmetic number, because the mean of its divisors is an integer number (54676881630).

Almost surely, 2^728570406535 is an apocalyptic number.

728570406535 is a deficient number, since it is larger than the sum of its proper divisors (146259699545).

728570406535 is a wasteful number, since it uses less digits than its factorization.

728570406535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17298.

The product of its (nonzero) digits is 7056000, while the sum is 52.

The spelling of 728570406535 in words is "seven hundred twenty-eight billion, five hundred seventy million, four hundred six thousand, five hundred thirty-five".