25720168 has 8 divisors (see below), whose sum is σ = 48225330. Its totient is φ = 12860080.

The previous prime is 25720159. The next prime is 25720169. The reversal of 25720168 is 86102752.

It can be written as a sum of positive squares in only one way, i.e., 25381444 + 338724 = 5038^2 + 582^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (25720169) 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 as a sum of consecutive naturals, namely, 1607503 + ... + 1607518.

Almost surely, 2^25720168 is an apocalyptic number.

It is an amenable number.

25720168 is a deficient number, since it is larger than the sum of its proper divisors (22505162).

25720168 is a wasteful number, since it uses less digits than its factorization.

25720168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215027 (or 3215023 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 25720168 is about 5071.5054963985. The cubic root of 25720168 is about 295.1829488564.

The spelling of 25720168 in words is "twenty-five million, seven hundred twenty thousand, one hundred sixty-eight".