25881998 has 8 divisors (see below), whose sum is σ = 38847000. Its totient is φ = 12933000.

The previous prime is 25881983. The next prime is 25882013. The reversal of 25881998 is 89918852.

It is an interprime number because it is at equal distance from previous prime (25881983) and next prime (25882013).

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

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, 1628 + ... + 7376.

It is an arithmetic number, because the mean of its divisors is an integer number (4855875).

Almost surely, 2^25881998 is an apocalyptic number.

25881998 is a deficient number, since it is larger than the sum of its proper divisors (12965002).

25881998 is a wasteful number, since it uses less digits than its factorization.

25881998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002.

The product of its digits is 414720, while the sum is 50.

The square root of 25881998 is about 5087.4353067140. The cubic root of 25881998 is about 295.8007470202.

The spelling of 25881998 in words is "twenty-five million, eight hundred eighty-one thousand, nine hundred ninety-eight".