28627213 has 4 divisors (see below), whose sum is σ = 29112480. Its totient is φ = 28141948.

The previous prime is 28627211. The next prime is 28627217. The reversal of 28627213 is 31272682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28627213 - 2¹ = 28627211 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 (28627211) 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, 242545 + ... + 242662.

It is an arithmetic number, because the mean of its divisors is an integer number (7278120).

Almost surely, 2^28627213 is an apocalyptic number.

It is an amenable number.

28627213 is a deficient number, since it is larger than the sum of its proper divisors (485267).

28627213 is an equidigital number, since it uses as much as digits as its factorization.

28627213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485266.

The product of its digits is 8064, while the sum is 31.

The square root of 28627213 is about 5350.4404491593. The cubic root of 28627213 is about 305.9095415189.

Adding to 28627213 its reverse (31272682), we get a palindrome (59899895).

The spelling of 28627213 in words is "twenty-eight million, six hundred twenty-seven thousand, two hundred thirteen".