28275447 has 16 divisors (see below), whose sum is σ = 38683008. Its totient is φ = 18364320.

The previous prime is 28275431. The next prime is 28275461. The reversal of 28275447 is 74457282.

It is not a de Polignac number, because 28275447 - 2⁴ = 28275431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28275427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25372 + ... + 26462.

It is an arithmetic number, because the mean of its divisors is an integer number (2417688).

Almost surely, 2^28275447 is an apocalyptic number.

28275447 is a deficient number, since it is larger than the sum of its proper divisors (10407561).

28275447 is a wasteful number, since it uses less digits than its factorization.

28275447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310.

The product of its digits is 125440, while the sum is 39.

The square root of 28275447 is about 5317.4662199209. The cubic root of 28275447 is about 304.6513870519.

The spelling of 28275447 in words is "twenty-eight million, two hundred seventy-five thousand, four hundred forty-seven".