25489986 has 8 divisors (see below), whose sum is σ = 50979984. Its totient is φ = 8496660.

The previous prime is 25489969. The next prime is 25489999. The reversal of 25489986 is 68998452.

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

25489986 is an admirable 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, 2124160 + ... + 2124171.

It is an arithmetic number, because the mean of its divisors is an integer number (6372498).

Almost surely, 2^25489986 is an apocalyptic number.

25489986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25489986 is a wasteful number, since it uses less digits than its factorization.

25489986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248336.

The product of its digits is 1244160, while the sum is 51.

The square root of 25489986 is about 5048.7608380671. The cubic root of 25489986 is about 294.2997313434.

The spelling of 25489986 in words is "twenty-five million, four hundred eighty-nine thousand, nine hundred eighty-six".