728170100 has 72 divisors (see below), whose sum is σ = 1816967040. Its totient is φ = 248123520.

The previous prime is 728170049. The next prime is 728170123. The reversal of 728170100 is 1071827.

It is a self number, because there is not a number n which added to its sum of digits gives 728170100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113786 + ... + 120014.

Almost surely, 2^728170100 is an apocalyptic number.

728170100 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728170100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (908483520).

728170100 is an abundant number, since it is smaller than the sum of its proper divisors (1088796940).

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

728170100 is a wasteful number, since it uses less digits than its factorization.

728170100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6417 (or 6410 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 728170100 is about 26984.6271050760. The cubic root of 728170100 is about 899.6583476868.

The spelling of 728170100 in words is "seven hundred twenty-eight million, one hundred seventy thousand, one hundred".