80728115 has 8 divisors (see below), whose sum is σ = 104325648. Its totient is φ = 59614560.

The previous prime is 80728111. The next prime is 80728127. The reversal of 80728115 is 51182708.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80728115 - 2² = 80728111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80728111) 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, 620921 + ... + 621050.

It is an arithmetic number, because the mean of its divisors is an integer number (13040706).

Almost surely, 2^80728115 is an apocalyptic number.

80728115 is a deficient number, since it is larger than the sum of its proper divisors (23597533).

80728115 is a wasteful number, since it uses less digits than its factorization.

80728115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241989.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 80728115 is about 8984.8825813140. The cubic root of 80728115 is about 432.1902222258.

The spelling of 80728115 in words is "eighty million, seven hundred twenty-eight thousand, one hundred fifteen".