28427547 has 8 divisors (see below), whose sum is σ = 37951056. Its totient is φ = 18927872.

The previous prime is 28427543. The next prime is 28427573. The reversal of 28427547 is 74572482.

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

It is a cyclic number.

It is not a de Polignac number, because 28427547 - 2² = 28427543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28427543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2958 + ... + 8099.

It is an arithmetic number, because the mean of its divisors is an integer number (4743882).

Almost surely, 2^28427547 is an apocalyptic number.

28427547 is a deficient number, since it is larger than the sum of its proper divisors (9523509).

28427547 is a wasteful number, since it uses less digits than its factorization.

28427547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11917.

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

The square root of 28427547 is about 5331.7489625825. The cubic root of 28427547 is about 305.1966732951.

The spelling of 28427547 in words is "twenty-eight million, four hundred twenty-seven thousand, five hundred forty-seven".