25840220 has 48 divisors (see below), whose sum is σ = 62307840. Its totient is φ = 8817984.

The previous prime is 25840207. The next prime is 25840223. The reversal of 25840220 is 2204852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25840223) 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 15 ways as a sum of consecutive naturals, for example, 52817 + ... + 53303.

It is an arithmetic number, because the mean of its divisors is an integer number (1298080).

Almost surely, 2^25840220 is an apocalyptic number.

25840220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25840220 is an abundant number, since it is smaller than the sum of its proper divisors (36467620).

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

25840220 is a wasteful number, since it uses less digits than its factorization.

25840220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 25840220 is about 5083.3276502700. The cubic root of 25840220 is about 295.6415035327.

The spelling of 25840220 in words is "twenty-five million, eight hundred forty thousand, two hundred twenty".