25055638 has 4 divisors (see below), whose sum is σ = 37583460. Its totient is φ = 12527818.

The previous prime is 25055621. The next prime is 25055647. The reversal of 25055638 is 83655052.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6263908 + ... + 6263911.

It is an arithmetic number, because the mean of its divisors is an integer number (9395865).

Almost surely, 2^25055638 is an apocalyptic number.

25055638 is a deficient number, since it is larger than the sum of its proper divisors (12527822).

25055638 is a wasteful number, since it uses less digits than its factorization.

25055638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12527821.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 25055638 is about 5005.5607078528. The cubic root of 25055638 is about 292.6185284354.

The spelling of 25055638 in words is "twenty-five million, fifty-five thousand, six hundred thirty-eight".