28728041 has 8 divisors (see below), whose sum is σ = 29741568. Its totient is φ = 27720000.

The previous prime is 28728023. The next prime is 28728061. The reversal of 28728041 is 14082782.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28728041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28727989 and 28728007.

It is not an unprimeable number, because it can be changed into a prime (28728001) 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, 11276 + ... + 13586.

It is an arithmetic number, because the mean of its divisors is an integer number (3717696).

Almost surely, 2^28728041 is an apocalyptic number.

It is an amenable number.

28728041 is a deficient number, since it is larger than the sum of its proper divisors (1013527).

28728041 is a wasteful number, since it uses less digits than its factorization.

28728041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 28728041 is about 5359.8545689226. The cubic root of 28728041 is about 306.2682690198.

The spelling of 28728041 in words is "twenty-eight million, seven hundred twenty-eight thousand, forty-one".