25655438 has 4 divisors (see below), whose sum is σ = 38483160. Its totient is φ = 12827718.

The previous prime is 25655437. The next prime is 25655447. The reversal of 25655438 is 83455652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25655437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6413858 + ... + 6413861.

It is an arithmetic number, because the mean of its divisors is an integer number (9620790).

Almost surely, 2^25655438 is an apocalyptic number.

25655438 is a deficient number, since it is larger than the sum of its proper divisors (12827722).

25655438 is a wasteful number, since it uses less digits than its factorization.

25655438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12827721.

The product of its digits is 144000, while the sum is 38.

The square root of 25655438 is about 5065.1197419212. The cubic root of 25655438 is about 294.9351116498.

The spelling of 25655438 in words is "twenty-five million, six hundred fifty-five thousand, four hundred thirty-eight".