28887223 has 2 divisors, whose sum is σ = 28887224. Its totient is φ = 28887222.

The previous prime is 28887211. The next prime is 28887253. The reversal of 28887223 is 32278882.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28887223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28887253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14443611 + 14443612.

It is an arithmetic number, because the mean of its divisors is an integer number (14443612).

Almost surely, 2^28887223 is an apocalyptic number.

28887223 is a deficient number, since it is larger than the sum of its proper divisors (1).

28887223 is an equidigital number, since it uses as much as digits as its factorization.

28887223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 40.

The square root of 28887223 is about 5374.6835255669. The cubic root of 28887223 is about 306.8329046446.

The spelling of 28887223 in words is "twenty-eight million, eight hundred eighty-seven thousand, two hundred twenty-three".