28856427 has 8 divisors (see below), whose sum is σ = 38512080. Its totient is φ = 19219200.

The previous prime is 28856417. The next prime is 28856441. The reversal of 28856427 is 72465882.

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 28856427 - 2¹⁰ = 28855403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28856417) 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, 402 + ... + 7607.

It is an arithmetic number, because the mean of its divisors is an integer number (4814010).

Almost surely, 2^28856427 is an apocalyptic number.

28856427 is a deficient number, since it is larger than the sum of its proper divisors (9655653).

28856427 is a wasteful number, since it uses less digits than its factorization.

28856427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9213.

The product of its digits is 215040, while the sum is 42.

The square root of 28856427 is about 5371.8178487361. The cubic root of 28856427 is about 306.7238300549.

The spelling of 28856427 in words is "twenty-eight million, eight hundred fifty-six thousand, four hundred twenty-seven".