25628140 has 12 divisors (see below), whose sum is σ = 53819136. Its totient is φ = 10251248.

The previous prime is 25628123. The next prime is 25628143. The reversal of 25628140 is 4182652.

It is a junction number, because it is equal to n+sod(n) for n = 25628099 and 25628108.

It is not an unprimeable number, because it can be changed into a prime (25628143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640684 + ... + 640723.

It is an arithmetic number, because the mean of its divisors is an integer number (4484928).

Almost surely, 2^25628140 is an apocalyptic number.

25628140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25628140 is an abundant number, since it is smaller than the sum of its proper divisors (28190996).

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

25628140 is a wasteful number, since it uses less digits than its factorization.

25628140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281416 (or 1281414 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 25628140 is about 5062.4243204220. The cubic root of 25628140 is about 294.8304685211.

The spelling of 25628140 in words is "twenty-five million, six hundred twenty-eight thousand, one hundred forty".