728700081172 has 36 divisors (see below), whose sum is σ = 1483475999040. Its totient is φ = 312289333104.

The previous prime is 728700081167. The next prime is 728700081173. The reversal of 728700081172 is 271180007827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728700081173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8830479 + ... + 8912617.

It is an arithmetic number, because the mean of its divisors is an integer number (41207666640).

Almost surely, 2^728700081172 is an apocalyptic number.

It is an amenable number.

728700081172 is an abundant number, since it is smaller than the sum of its proper divisors (754775917868).

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

728700081172 is a wasteful number, since it uses less digits than its factorization.

728700081172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127420 (or 127411 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 43.

Adding to 728700081172 its reverse (271180007827), we get a palindrome (999880088999).

The spelling of 728700081172 in words is "seven hundred twenty-eight billion, seven hundred million, eighty-one thousand, one hundred seventy-two".