28614557 has 2 divisors, whose sum is σ = 28614558. Its totient is φ = 28614556.

The previous prime is 28614529. The next prime is 28614559. The reversal of 28614557 is 75541682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16924996 + 11689561 = 4114^2 + 3419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28614557 is a prime.

Together with 28614559, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28614557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28614559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14307278 + 14307279.

It is an arithmetic number, because the mean of its divisors is an integer number (14307279).

Almost surely, 2^28614557 is an apocalyptic number.

It is an amenable number.

28614557 is a deficient number, since it is larger than the sum of its proper divisors (1).

28614557 is an equidigital number, since it uses as much as digits as its factorization.

28614557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 38.

The square root of 28614557 is about 5349.2576120430. The cubic root of 28614557 is about 305.8644543282.

The spelling of 28614557 in words is "twenty-eight million, six hundred fourteen thousand, five hundred fifty-seven".