25981438 has 8 divisors (see below), whose sum is σ = 44539632. Its totient is φ = 11134896.

The previous prime is 25981429. The next prime is 25981447. The reversal of 25981438 is 83418952.

It is an interprime number because it is at equal distance from previous prime (25981429) and next prime (25981447).

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

It is a self number, because there is not a number n which added to its sum of digits gives 25981438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927895 + ... + 927922.

It is an arithmetic number, because the mean of its divisors is an integer number (5567454).

Almost surely, 2^25981438 is an apocalyptic number.

25981438 is a deficient number, since it is larger than the sum of its proper divisors (18558194).

25981438 is a wasteful number, since it uses less digits than its factorization.

25981438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855826.

The product of its digits is 69120, while the sum is 40.

The square root of 25981438 is about 5097.1990347641. The cubic root of 25981438 is about 296.1790902466.

The spelling of 25981438 in words is "twenty-five million, nine hundred eighty-one thousand, four hundred thirty-eight".