28425637 has 2 divisors, whose sum is σ = 28425638. Its totient is φ = 28425636.

The previous prime is 28425629. The next prime is 28425643. The reversal of 28425637 is 73652482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18653761 + 9771876 = 4319^2 + 3126^2 .

It is a cyclic number.

It is not a de Polignac number, because 28425637 - 2³ = 28425629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28425596 and 28425605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28425337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14212818 + 14212819.

It is an arithmetic number, because the mean of its divisors is an integer number (14212819).

Almost surely, 2^28425637 is an apocalyptic number.

It is an amenable number.

28425637 is a deficient number, since it is larger than the sum of its proper divisors (1).

28425637 is an equidigital number, since it uses as much as digits as its factorization.

28425637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

The square root of 28425637 is about 5331.5698438640. The cubic root of 28425637 is about 305.1898379217.

It can be divided in two parts, 284 and 25637, that added together give a square (25921 = 161²).

The spelling of 28425637 in words is "twenty-eight million, four hundred twenty-five thousand, six hundred thirty-seven".