28038551 has 2 divisors, whose sum is σ = 28038552. Its totient is φ = 28038550.

The previous prime is 28038533. The next prime is 28038583. The reversal of 28038551 is 15583082.

It is a happy number.

It is an a-pointer prime, because the next prime (28038583) can be obtained adding 28038551 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28038551 - 2¹⁴ = 28022167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28038251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14019275 + 14019276.

It is an arithmetic number, because the mean of its divisors is an integer number (14019276).

Almost surely, 2^28038551 is an apocalyptic number.

28038551 is a deficient number, since it is larger than the sum of its proper divisors (1).

28038551 is an equidigital number, since it uses as much as digits as its factorization.

28038551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 28038551 is about 5295.1440962452. The cubic root of 28038551 is about 303.7981946367.

The spelling of 28038551 in words is "twenty-eight million, thirty-eight thousand, five hundred fifty-one".