28087733 has 2 divisors, whose sum is σ = 28087734. Its totient is φ = 28087732.

The previous prime is 28087693. The next prime is 28087751. The reversal of 28087733 is 33778082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14122564 + 13965169 = 3758^2 + 3737^2 .

It is a cyclic number.

It is not a de Polignac number, because 28087733 - 2¹⁴ = 28071349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28087753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14043866 + 14043867.

It is an arithmetic number, because the mean of its divisors is an integer number (14043867).

Almost surely, 2^28087733 is an apocalyptic number.

It is an amenable number.

28087733 is a deficient number, since it is larger than the sum of its proper divisors (1).

28087733 is an equidigital number, since it uses as much as digits as its factorization.

28087733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 28087733 is about 5299.7861277603. The cubic root of 28087733 is about 303.9757201581.

The spelling of 28087733 in words is "twenty-eight million, eighty-seven thousand, seven hundred thirty-three".