25638466 has 24 divisors (see below), whose sum is σ = 44914176. Its totient is φ = 10944360.

The previous prime is 25638463. The next prime is 25638493. The reversal of 25638466 is 66483652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25638463) 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 11 ways as a sum of consecutive naturals, for example, 41935 + ... + 42541.

It is an arithmetic number, because the mean of its divisors is an integer number (1871424).

Almost surely, 2^25638466 is an apocalyptic number.

25638466 is a deficient number, since it is larger than the sum of its proper divisors (19275710).

25638466 is a wasteful number, since it uses less digits than its factorization.

25638466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054 (or 1047 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 25638466 is about 5063.4440848103. Note that the first 3 decimals coincide. The cubic root of 25638466 is about 294.8700605559.

The spelling of 25638466 in words is "twenty-five million, six hundred thirty-eight thousand, four hundred sixty-six".