80172728 has 32 divisors (see below), whose sum is σ = 153036000. Its totient is φ = 39370368.

The previous prime is 80172721. The next prime is 80172739. The reversal of 80172728 is 82727108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80172721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122450 + ... + 123102.

It is an arithmetic number, because the mean of its divisors is an integer number (4782375).

Almost surely, 2^80172728 is an apocalyptic number.

It is an amenable number.

80172728 is a deficient number, since it is larger than the sum of its proper divisors (72863272).

80172728 is a wasteful number, since it uses less digits than its factorization.

80172728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 80172728 is about 8953.9224924052. The cubic root of 80172728 is about 431.1968244173.

The spelling of 80172728 in words is "eighty million, one hundred seventy-two thousand, seven hundred twenty-eight".