28263377 has 2 divisors, whose sum is σ = 28263378. Its totient is φ = 28263376.

The previous prime is 28263359. The next prime is 28263379. The reversal of 28263377 is 77336282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14984641 + 13278736 = 3871^2 + 3644^2 .

It is a cyclic number.

It is not a de Polignac number, because 28263377 - 2¹² = 28259281 is a prime.

Together with 28263379, 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 28263377.

It is not a weakly prime, because it can be changed into another prime (28263379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14131688 + 14131689.

It is an arithmetic number, because the mean of its divisors is an integer number (14131689).

Almost surely, 2^28263377 is an apocalyptic number.

It is an amenable number.

28263377 is a deficient number, since it is larger than the sum of its proper divisors (1).

28263377 is an equidigital number, since it uses as much as digits as its factorization.

28263377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 38.

The square root of 28263377 is about 5316.3311597379. The cubic root of 28263377 is about 304.6080318212.

The spelling of 28263377 in words is "twenty-eight million, two hundred sixty-three thousand, three hundred seventy-seven".