28472347 has 4 divisors (see below), whose sum is σ = 28573240. Its totient is φ = 28371456.

The previous prime is 28472329. The next prime is 28472357. The reversal of 28472347 is 74327482.

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 28472347 - 2⁷ = 28472219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28472357) 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 3 ways as a sum of consecutive naturals, for example, 50022 + ... + 50587.

It is an arithmetic number, because the mean of its divisors is an integer number (7143310).

Almost surely, 2^28472347 is an apocalyptic number.

28472347 is a deficient number, since it is larger than the sum of its proper divisors (100893).

28472347 is a wasteful number, since it uses less digits than its factorization.

28472347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100892.

The product of its digits is 75264, while the sum is 37.

The square root of 28472347 is about 5335.9485567235. The cubic root of 28472347 is about 305.3569126427.

The spelling of 28472347 in words is "twenty-eight million, four hundred seventy-two thousand, three hundred forty-seven".