25490636 has 6 divisors (see below), whose sum is σ = 44608620. Its totient is φ = 12745316.

The previous prime is 25490629. The next prime is 25490639. The reversal of 25490636 is 63609452.

It is a junction number, because it is equal to n+sod(n) for n = 25490596 and 25490605.

It is not an unprimeable number, because it can be changed into a prime (25490639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3186326 + ... + 3186333.

It is an arithmetic number, because the mean of its divisors is an integer number (7434770).

Almost surely, 2^25490636 is an apocalyptic number.

It is an amenable number.

25490636 is a deficient number, since it is larger than the sum of its proper divisors (19117984).

25490636 is a wasteful number, since it uses less digits than its factorization.

25490636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6372663 (or 6372661 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 25490636 is about 5048.8252098879. The cubic root of 25490636 is about 294.3022328904.

The spelling of 25490636 in words is "twenty-five million, four hundred ninety thousand, six hundred thirty-six".