28867651 has 2 divisors, whose sum is σ = 28867652. Its totient is φ = 28867650.

The previous prime is 28867633. The next prime is 28867679. The reversal of 28867651 is 15676882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28867651 - 2⁷ = 28867523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28867598 and 28867607.

It is not a weakly prime, because it can be changed into another prime (28867621) 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 as a sum of consecutive naturals, namely, 14433825 + 14433826.

It is an arithmetic number, because the mean of its divisors is an integer number (14433826).

Almost surely, 2^28867651 is an apocalyptic number.

28867651 is a deficient number, since it is larger than the sum of its proper divisors (1).

28867651 is an equidigital number, since it uses as much as digits as its factorization.

28867651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 28867651 is about 5372.8624586900. The cubic root of 28867651 is about 306.7635926817.

The spelling of 28867651 in words is "twenty-eight million, eight hundred sixty-seven thousand, six hundred fifty-one".