25788631 has 16 divisors (see below), whose sum is σ = 29062656. Its totient is φ = 22680000.

The previous prime is 25788619. The next prime is 25788649. The reversal of 25788631 is 13688752.

It is a 6-Lehmer number, since φ(25788631) divides (25788631-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 25788631 - 2⁵ = 25788599 is a prime.

It is a super-2 number, since 2×25788631² = 1330106977708322, which contains 22 as substring.

It is a deceptive number, since it divides R_25788630.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25788601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95026 + ... + 95296.

It is an arithmetic number, because the mean of its divisors is an integer number (1816416).

Almost surely, 2^25788631 is an apocalyptic number.

25788631 is a deficient number, since it is larger than the sum of its proper divisors (3274025).

25788631 is a wasteful number, since it uses less digits than its factorization.

25788631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534.

The product of its digits is 80640, while the sum is 40.

The square root of 25788631 is about 5078.2507815192. The cubic root of 25788631 is about 295.4446268458. Note that the first 3 decimals are identical.

It can be divided in two parts, 257 and 88631, that added together give a palindrome (88888).

The spelling of 25788631 in words is "twenty-five million, seven hundred eighty-eight thousand, six hundred thirty-one".