25668840 has 64 divisors (see below), whose sum is σ = 77342400. Its totient is φ = 6815232.

The previous prime is 25668823. The next prime is 25668883. The reversal of 25668840 is 4886652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48819 + ... + 49341.

It is an arithmetic number, because the mean of its divisors is an integer number (1208475).

Almost surely, 2^25668840 is an apocalyptic number.

25668840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25668840 is an abundant number, since it is smaller than the sum of its proper divisors (51673560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25668840 is a wasteful number, since it uses less digits than its factorization.

25668840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 942 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 25668840 is about 5066.4425389024. The cubic root of 25668840 is about 294.9864592080.

It can be divided in two parts, 256 and 68840, that added together give a palindrome (69096).

The spelling of 25668840 in words is "twenty-five million, six hundred sixty-eight thousand, eight hundred forty".