28936447 has 8 divisors (see below), whose sum is σ = 29776320. Its totient is φ = 28103040.

The previous prime is 28936441. The next prime is 28936483. The reversal of 28936447 is 74463982.

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

It is not a de Polignac number, because 28936447 - 2¹⁹ = 28412159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28936441) 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, 8323 + ... + 11275.

It is an arithmetic number, because the mean of its divisors is an integer number (3722040).

Almost surely, 2^28936447 is an apocalyptic number.

28936447 is a deficient number, since it is larger than the sum of its proper divisors (839873).

28936447 is a wasteful number, since it uses less digits than its factorization.

28936447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233.

The product of its digits is 290304, while the sum is 43.

The square root of 28936447 is about 5379.2608228269. The cubic root of 28936447 is about 307.0070874447.

The spelling of 28936447 in words is "twenty-eight million, nine hundred thirty-six thousand, four hundred forty-seven".