28068425 has 36 divisors (see below), whose sum is σ = 44189136. Its totient is φ = 17488800.

The previous prime is 28068421. The next prime is 28068431. The reversal of 28068425 is 52486082.

It is not a de Polignac number, because 28068425 - 2² = 28068421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28068421) 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 35 ways as a sum of consecutive naturals, for example, 12434 + ... + 14516.

It is an arithmetic number, because the mean of its divisors is an integer number (1227476).

Almost surely, 2^28068425 is an apocalyptic number.

28068425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28068425 is a deficient number, since it is larger than the sum of its proper divisors (16120711).

28068425 is a wasteful number, since it uses less digits than its factorization.

28068425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118 (or 2106 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 28068425 is about 5297.9642316648. The cubic root of 28068425 is about 303.9060514457.

The spelling of 28068425 in words is "twenty-eight million, sixty-eight thousand, four hundred twenty-five".