25918138 has 8 divisors (see below), whose sum is σ = 38930580. Its totient is φ = 12941280.

The previous prime is 25918133. The next prime is 25918153. The reversal of 25918138 is 83181952.

It can be written as a sum of positive squares in 2 ways, for example, as 24830289 + 1087849 = 4983^2 + 1043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25918097 and 25918106.

It is not an unprimeable number, because it can be changed into a prime (25918133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6993 + ... + 10036.

Almost surely, 2^25918138 is an apocalyptic number.

25918138 is a deficient number, since it is larger than the sum of its proper divisors (13012442).

25918138 is a wasteful number, since it uses less digits than its factorization.

25918138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17792.

The product of its digits is 17280, while the sum is 37.

The square root of 25918138 is about 5090.9859555886. The cubic root of 25918138 is about 295.9383621961.

The spelling of 25918138 in words is "twenty-five million, nine hundred eighteen thousand, one hundred thirty-eight".