28265837 has 2 divisors, whose sum is σ = 28265838. Its totient is φ = 28265836.

The previous prime is 28265833. The next prime is 28265843. The reversal of 28265837 is 73856282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26894596 + 1371241 = 5186^2 + 1171^2 .

It is a cyclic number.

It is not a de Polignac number, because 28265837 - 2² = 28265833 is a prime.

It is a super-4 number, since 4×28265837⁴ (a number of 31 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28265794 and 28265803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28265833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14132918 + 14132919.

It is an arithmetic number, because the mean of its divisors is an integer number (14132919).

Almost surely, 2^28265837 is an apocalyptic number.

It is an amenable number.

28265837 is a deficient number, since it is larger than the sum of its proper divisors (1).

28265837 is an equidigital number, since it uses as much as digits as its factorization.

28265837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 28265837 is about 5316.5625172662. The cubic root of 28265837 is about 304.6168690999.

The spelling of 28265837 in words is "twenty-eight million, two hundred sixty-five thousand, eight hundred thirty-seven".