28563425 has 12 divisors (see below), whose sum is σ = 38638896. Its totient is φ = 20773200.

The previous prime is 28563419. The next prime is 28563427. The reversal of 28563425 is 52436582.

It is not a de Polignac number, because 28563425 - 2⁶ = 28563361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28563427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51659 + ... + 52208.

It is an arithmetic number, because the mean of its divisors is an integer number (3219908).

Almost surely, 2^28563425 is an apocalyptic number.

28563425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28563425 is a deficient number, since it is larger than the sum of its proper divisors (10075471).

28563425 is a wasteful number, since it uses less digits than its factorization.

28563425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103888 (or 103883 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 28563425 is about 5344.4761202573. The cubic root of 28563425 is about 305.6821603296.

The spelling of 28563425 in words is "twenty-eight million, five hundred sixty-three thousand, four hundred twenty-five".