25890720 has 48 divisors (see below), whose sum is σ = 81557280. Its totient is φ = 6904064.

The previous prime is 25890703. The next prime is 25890731. The reversal of 25890720 is 2709852.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

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, 26490 + ... + 27449.

It is an arithmetic number, because the mean of its divisors is an integer number (1699110).

Almost surely, 2^25890720 is an apocalyptic number.

25890720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25890720 is an abundant number, since it is smaller than the sum of its proper divisors (55666560).

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

25890720 is a wasteful number, since it uses less digits than its factorization.

25890720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53957 (or 53949 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 25890720 is about 5088.2924444257. The cubic root of 25890720 is about 295.8339706835.

The spelling of 25890720 in words is "twenty-five million, eight hundred ninety thousand, seven hundred twenty".