28214777 has 2 divisors, whose sum is σ = 28214778. Its totient is φ = 28214776.

The previous prime is 28214741. The next prime is 28214801. The reversal of 28214777 is 77741282.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26429881 + 1784896 = 5141^2 + 1336^2 .

It is a cyclic number.

It is not a de Polignac number, because 28214777 - 2⁸ = 28214521 is a prime.

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 28214777.

It is not a weakly prime, because it can be changed into another prime (28214707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14107388 + 14107389.

It is an arithmetic number, because the mean of its divisors is an integer number (14107389).

Almost surely, 2^28214777 is an apocalyptic number.

It is an amenable number.

28214777 is a deficient number, since it is larger than the sum of its proper divisors (1).

28214777 is an equidigital number, since it uses as much as digits as its factorization.

28214777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43904, while the sum is 38.

The square root of 28214777 is about 5311.7583717635. The cubic root of 28214777 is about 304.4333364455.

The spelling of 28214777 in words is "twenty-eight million, two hundred fourteen thousand, seven hundred seventy-seven".