28486109 has 2 divisors, whose sum is σ = 28486110. Its totient is φ = 28486108.

The previous prime is 28486097. The next prime is 28486127. The reversal of 28486109 is 90168482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24780484 + 3705625 = 4978^2 + 1925^2 .

It is a cyclic number.

It is not a de Polignac number, because 28486109 - 2¹⁶ = 28420573 is a prime.

It is a super-2 number, since 2×28486109² = 1622916811919762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28486009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14243054 + 14243055.

It is an arithmetic number, because the mean of its divisors is an integer number (14243055).

Almost surely, 2^28486109 is an apocalyptic number.

It is an amenable number.

28486109 is a deficient number, since it is larger than the sum of its proper divisors (1).

28486109 is an equidigital number, since it uses as much as digits as its factorization.

28486109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 28486109 is about 5337.2379560968. The cubic root of 28486109 is about 305.4061024169.

The spelling of 28486109 in words is "twenty-eight million, four hundred eighty-six thousand, one hundred nine".