25628481 has 12 divisors (see below), whose sum is σ = 38390352. Its totient is φ = 17085492.

The previous prime is 25628459. The next prime is 25628483. The reversal of 25628481 is 18482652.

25628481 is a `hidden beast` number, since 25 + 628 + 4 + 8 + 1 = 666.

It is not a de Polignac number, because 25628481 - 2²² = 21434177 is a prime.

It is a super-2 number, since 2×25628481² = 1313638076734722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25628483) 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 11 ways as a sum of consecutive naturals, for example, 52491 + ... + 52976.

It is an arithmetic number, because the mean of its divisors is an integer number (3199196).

Almost surely, 2^25628481 is an apocalyptic number.

It is an amenable number.

25628481 is a deficient number, since it is larger than the sum of its proper divisors (12761871).

25628481 is an equidigital number, since it uses as much as digits as its factorization.

25628481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105482 (or 105470 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 25628481 is about 5062.4579998258. The cubic root of 25628481 is about 294.8317761559.

The spelling of 25628481 in words is "twenty-five million, six hundred twenty-eight thousand, four hundred eighty-one".