25283638 has 4 divisors (see below), whose sum is σ = 37925460. Its totient is φ = 12641818.

The previous prime is 25283581. The next prime is 25283651. The reversal of 25283638 is 83638252.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 25283597 and 25283606.

It is a congruent number.

It is an unprimeable number.

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, 6320908 + ... + 6320911.

It is an arithmetic number, because the mean of its divisors is an integer number (9481365).

Almost surely, 2^25283638 is an apocalyptic number.

25283638 is a deficient number, since it is larger than the sum of its proper divisors (12641822).

25283638 is a wasteful number, since it uses less digits than its factorization.

25283638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12641821.

The product of its digits is 69120, while the sum is 37.

The square root of 25283638 is about 5028.2838026508. The cubic root of 25283638 is about 293.5034346855.

It can be divided in two parts, 25283 and 638, that added together give a square (25921 = 161²).

The spelling of 25283638 in words is "twenty-five million, two hundred eighty-three thousand, six hundred thirty-eight".