25395820 has 24 divisors (see below), whose sum is σ = 55052928. Its totient is φ = 9830400.

The previous prime is 25395817. The next prime is 25395829. The reversal of 25395820 is 2859352.

It is not an unprimeable number, because it can be changed into a prime (25395829) 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, 19861 + ... + 21100.

It is an arithmetic number, because the mean of its divisors is an integer number (2293872).

Almost surely, 2^25395820 is an apocalyptic number.

25395820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25395820 is an abundant number, since it is smaller than the sum of its proper divisors (29657108).

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

25395820 is a wasteful number, since it uses less digits than its factorization.

25395820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41001 (or 40999 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 25395820 is about 5039.4265546786. The cubic root of 25395820 is about 293.9368800278.

The spelling of 25395820 in words is "twenty-five million, three hundred ninety-five thousand, eight hundred twenty".