25655238 has 64 divisors (see below), whose sum is σ = 66193920. Its totient is φ = 7213536.

The previous prime is 25655237. The next prime is 25655249. The reversal of 25655238 is 83255652.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25655237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24820 + ... + 25832.

It is an arithmetic number, because the mean of its divisors is an integer number (1034280).

Almost surely, 2^25655238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25655238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33096960).

25655238 is an abundant number, since it is smaller than the sum of its proper divisors (40538682).

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

25655238 is a wasteful number, since it uses less digits than its factorization.

25655238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098 (or 1092 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 25655238 is about 5065.0999990129. The cubic root of 25655238 is about 294.9343452473.

The spelling of 25655238 in words is "twenty-five million, six hundred fifty-five thousand, two hundred thirty-eight".