28837247 has 4 divisors (see below), whose sum is σ = 29381400. Its totient is φ = 28293096.

The previous prime is 28837243. The next prime is 28837279. The reversal of 28837247 is 74273882.

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

It is not a de Polignac number, because 28837247 - 2² = 28837243 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 (28837241) 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, 271997 + ... + 272102.

It is an arithmetic number, because the mean of its divisors is an integer number (7345350).

Almost surely, 2^28837247 is an apocalyptic number.

28837247 is a deficient number, since it is larger than the sum of its proper divisors (544153).

28837247 is an equidigital number, since it uses as much as digits as its factorization.

28837247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544152.

The product of its digits is 150528, while the sum is 41.

The square root of 28837247 is about 5370.0323090276. The cubic root of 28837247 is about 306.6558582885.

The spelling of 28837247 in words is "twenty-eight million, eight hundred thirty-seven thousand, two hundred forty-seven".