25855720 has 32 divisors (see below), whose sum is σ = 63465120. Its totient is φ = 9401920.

The previous prime is 25855717. The next prime is 25855721. The reversal of 25855720 is 2755852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25855721) 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 7 ways as a sum of consecutive naturals, for example, 28942 + ... + 29821.

It is an arithmetic number, because the mean of its divisors is an integer number (1983285).

Almost surely, 2^25855720 is an apocalyptic number.

25855720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25855720 is an abundant number, since it is smaller than the sum of its proper divisors (37609400).

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

25855720 is a wasteful number, since it uses less digits than its factorization.

25855720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58785 (or 58781 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 25855720 is about 5084.8520135792. The cubic root of 25855720 is about 295.7006042597.

The spelling of 25855720 in words is "twenty-five million, eight hundred fifty-five thousand, seven hundred twenty".