25821968 has 10 divisors (see below), whose sum is σ = 50030094. Its totient is φ = 12910976.

The previous prime is 25821949. The next prime is 25822009. The reversal of 25821968 is 86912852.

It can be written as a sum of positive squares in only one way, i.e., 15272464 + 10549504 = 3908^2 + 3248^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806921 + ... + 806952.

Almost surely, 2^25821968 is an apocalyptic number.

It is an amenable number.

25821968 is a deficient number, since it is larger than the sum of its proper divisors (24208126).

25821968 is a wasteful number, since it uses less digits than its factorization.

25821968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613881 (or 1613875 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 25821968 is about 5081.5320524425. The cubic root of 25821968 is about 295.5718792583.

The spelling of 25821968 in words is "twenty-five million, eight hundred twenty-one thousand, nine hundred sixty-eight".