25788491 has 8 divisors (see below), whose sum is σ = 27519120. Its totient is φ = 24095232.

The previous prime is 25788481. The next prime is 25788509. The reversal of 25788491 is 19488752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25788491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25788461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7910 + ... + 10683.

It is an arithmetic number, because the mean of its divisors is an integer number (3439890).

Almost surely, 2^25788491 is an apocalyptic number.

25788491 is a deficient number, since it is larger than the sum of its proper divisors (1730629).

25788491 is a wasteful number, since it uses less digits than its factorization.

25788491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18685.

The product of its digits is 161280, while the sum is 44.

The square root of 25788491 is about 5078.2369972265. The cubic root of 25788491 is about 295.4440922133. Note that the first 3 decimals are identical.

The spelling of 25788491 in words is "twenty-five million, seven hundred eighty-eight thousand, four hundred ninety-one".