28519837 has 2 divisors, whose sum is σ = 28519838. Its totient is φ = 28519836.

The previous prime is 28519819. The next prime is 28519867. The reversal of 28519837 is 73891582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24810361 + 3709476 = 4981^2 + 1926^2 .

It is a cyclic number.

It is not a de Polignac number, because 28519837 - 2⁷ = 28519709 is a prime.

It is a super-2 number, since 2×28519837² = 1626762205013138, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28519793 and 28519802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28519867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14259918 + 14259919.

It is an arithmetic number, because the mean of its divisors is an integer number (14259919).

Almost surely, 2^28519837 is an apocalyptic number.

It is an amenable number.

28519837 is a deficient number, since it is larger than the sum of its proper divisors (1).

28519837 is an equidigital number, since it uses as much as digits as its factorization.

28519837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 28519837 is about 5340.3967081107. The cubic root of 28519837 is about 305.5265900819.

The spelling of 28519837 in words is "twenty-eight million, five hundred nineteen thousand, eight hundred thirty-seven".