28628837 has 2 divisors, whose sum is σ = 28628838. Its totient is φ = 28628836.

The previous prime is 28628827. The next prime is 28628843. The reversal of 28628837 is 73882682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22743361 + 5885476 = 4769^2 + 2426^2 .

It is a cyclic number.

It is not a de Polignac number, because 28628837 - 2¹² = 28624741 is a prime.

It is a super-2 number, since 2×28628837² = 1639220615945138, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28628807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14314418 + 14314419.

It is an arithmetic number, because the mean of its divisors is an integer number (14314419).

Almost surely, 2^28628837 is an apocalyptic number.

It is an amenable number.

28628837 is a deficient number, since it is larger than the sum of its proper divisors (1).

28628837 is an equidigital number, since it uses as much as digits as its factorization.

28628837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 44.

The square root of 28628837 is about 5350.5922102137. The cubic root of 28628837 is about 305.9153260813.

The spelling of 28628837 in words is "twenty-eight million, six hundred twenty-eight thousand, eight hundred thirty-seven".