28455887 has 2 divisors, whose sum is σ = 28455888. Its totient is φ = 28455886.

The previous prime is 28455883. The next prime is 28455893. The reversal of 28455887 is 78855482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28455887 - 2² = 28455883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28455883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14227943 + 14227944.

It is an arithmetic number, because the mean of its divisors is an integer number (14227944).

Almost surely, 2^28455887 is an apocalyptic number.

28455887 is a deficient number, since it is larger than the sum of its proper divisors (1).

28455887 is an equidigital number, since it uses as much as digits as its factorization.

28455887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 716800, while the sum is 47.

The square root of 28455887 is about 5334.4059650537. The cubic root of 28455887 is about 305.2980585360.

The spelling of 28455887 in words is "twenty-eight million, four hundred fifty-five thousand, eight hundred eighty-seven".