28764553 has 2 divisors, whose sum is σ = 28764554. Its totient is φ = 28764552.

The previous prime is 28764551. The next prime is 28764557. The reversal of 28764553 is 35546782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16744464 + 12020089 = 4092^2 + 3467^2 .

It is a cyclic number.

It is not a de Polignac number, because 28764553 - 2¹ = 28764551 is a prime.

Together with 28764551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28764551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14382276 + 14382277.

It is an arithmetic number, because the mean of its divisors is an integer number (14382277).

Almost surely, 2^28764553 is an apocalyptic number.

It is an amenable number.

28764553 is a deficient number, since it is larger than the sum of its proper divisors (1).

28764553 is an equidigital number, since it uses as much as digits as its factorization.

28764553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 40.

The square root of 28764553 is about 5363.2595499379. The cubic root of 28764553 is about 306.3979649839.

The spelling of 28764553 in words is "twenty-eight million, seven hundred sixty-four thousand, five hundred fifty-three".