728738187 has 16 divisors (see below), whose sum is σ = 1048861440. Its totient is φ = 448677152.

The previous prime is 728738161. The next prime is 728738191. The reversal of 728738187 is 781837827.

It is a cyclic number.

It is not a de Polignac number, because 728738187 - 2⁶ = 728738123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728738137) 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, 180093 + ... + 184094.

It is an arithmetic number, because the mean of its divisors is an integer number (65553840).

Almost surely, 2^728738187 is an apocalyptic number.

728738187 is a deficient number, since it is larger than the sum of its proper divisors (320123253).

728738187 is a wasteful number, since it uses less digits than its factorization.

728738187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364242.

The product of its digits is 1053696, while the sum is 51.

The square root of 728738187 is about 26995.1511757204. The cubic root of 728738187 is about 899.8922451240.

The spelling of 728738187 in words is "seven hundred twenty-eight million, seven hundred thirty-eight thousand, one hundred eighty-seven".