28469825 has 6 divisors (see below), whose sum is σ = 35302614. Its totient is φ = 22775840.

The previous prime is 28469821. The next prime is 28469839. The reversal of 28469825 is 52896482.

It can be written as a sum of positive squares in 3 ways, for example, as 39601 + 28430224 = 199^2 + 5332^2 .

It is not a de Polignac number, because 28469825 - 2² = 28469821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28469821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 569372 + ... + 569421.

It is an arithmetic number, because the mean of its divisors is an integer number (5883769).

Almost surely, 2^28469825 is an apocalyptic number.

28469825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28469825 is a deficient number, since it is larger than the sum of its proper divisors (6832789).

28469825 is a wasteful number, since it uses less digits than its factorization.

28469825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138803 (or 1138798 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 28469825 is about 5335.7122298715. The cubic root of 28469825 is about 305.3478964925.

The spelling of 28469825 in words is "twenty-eight million, four hundred sixty-nine thousand, eight hundred twenty-five".