28514047 has 4 divisors (see below), whose sum is σ = 29497320. Its totient is φ = 27530776.

The previous prime is 28514039. The next prime is 28514063. The reversal of 28514047 is 74041582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28514047 - 2³ = 28514039 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 (28514077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491593 + ... + 491650.

It is an arithmetic number, because the mean of its divisors is an integer number (7374330).

Almost surely, 2^28514047 is an apocalyptic number.

28514047 is a deficient number, since it is larger than the sum of its proper divisors (983273).

28514047 is an equidigital number, since it uses as much as digits as its factorization.

28514047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983272.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 28514047 is about 5339.8545860351. The cubic root of 28514047 is about 305.5059130273.

The spelling of 28514047 in words is "twenty-eight million, five hundred fourteen thousand, forty-seven".