28034247 has 4 divisors (see below), whose sum is σ = 37379000. Its totient is φ = 18689496.

The previous prime is 28034233. The next prime is 28034249. The reversal of 28034247 is 74243082.

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

It is not a de Polignac number, because 28034247 - 2⁶ = 28034183 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 (28034249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4672372 + ... + 4672377.

It is an arithmetic number, because the mean of its divisors is an integer number (9344750).

Almost surely, 2^28034247 is an apocalyptic number.

28034247 is a deficient number, since it is larger than the sum of its proper divisors (9344753).

28034247 is an equidigital number, since it uses as much as digits as its factorization.

28034247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9344752.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 28034247 is about 5294.7376705555. The cubic root of 28034247 is about 303.7826492027.

The spelling of 28034247 in words is "twenty-eight million, thirty-four thousand, two hundred forty-seven".