728631100 has 18 divisors (see below), whose sum is σ = 1581129704. Its totient is φ = 291452400.

The previous prime is 728631077. The next prime is 728631107. The reversal of 728631100 is 1136827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728631107) 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, 3643056 + ... + 3643255.

Almost surely, 2^728631100 is an apocalyptic number.

It is an amenable number.

728631100 is an abundant number, since it is smaller than the sum of its proper divisors (852498604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728631100 is a wasteful number, since it uses less digits than its factorization.

728631100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286325 (or 7286318 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 728631100 is about 26993.1676540565. The cubic root of 728631100 is about 899.8481636860.

Adding to 728631100 its reverse (1136827), we get a palindrome (729767927).

The spelling of 728631100 in words is "seven hundred twenty-eight million, six hundred thirty-one thousand, one hundred".