25945820 has 24 divisors (see below), whose sum is σ = 54839904. Its totient is φ = 10310976.

The previous prime is 25945783. The next prime is 25945823. The reversal of 25945820 is 2854952.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25945823) 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, 992 + ... + 7271.

It is an arithmetic number, because the mean of its divisors is an integer number (2284996).

Almost surely, 2^25945820 is an apocalyptic number.

25945820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25945820 is an abundant number, since it is smaller than the sum of its proper divisors (28894084).

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

25945820 is a wasteful number, since it uses less digits than its factorization.

25945820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8429 (or 8427 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 25945820 is about 5093.7039568471. The cubic root of 25945820 is about 296.0436842028.

The spelling of 25945820 in words is "twenty-five million, nine hundred forty-five thousand, eight hundred twenty".