28344425 has 6 divisors (see below), whose sum is σ = 35147118. Its totient is φ = 22675520.

The previous prime is 28344403. The next prime is 28344451. The reversal of 28344425 is 52444382.

It can be written as a sum of positive squares in 3 ways, for example, as 9168784 + 19175641 = 3028^2 + 4379^2 .

It is not a de Polignac number, because 28344425 - 2¹² = 28340329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28344391 and 28344400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566864 + ... + 566913.

It is an arithmetic number, because the mean of its divisors is an integer number (5857853).

Almost surely, 2^28344425 is an apocalyptic number.

28344425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28344425 is a deficient number, since it is larger than the sum of its proper divisors (6802693).

28344425 is a wasteful number, since it uses less digits than its factorization.

28344425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133787 (or 1133782 counting only the distinct ones).

The product of its digits is 30720, while the sum is 32.

The square root of 28344425 is about 5323.9482529416. The cubic root of 28344425 is about 304.8989183984.

The spelling of 28344425 in words is "twenty-eight million, three hundred forty-four thousand, four hundred twenty-five".