25850840 has 16 divisors (see below), whose sum is σ = 58164480. Its totient is φ = 10340320.

The previous prime is 25850831. The next prime is 25850843. The reversal of 25850840 is 4805852.

It is a junction number, because it is equal to n+sod(n) for n = 25850797 and 25850806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25850843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323096 + ... + 323175.

It is an arithmetic number, because the mean of its divisors is an integer number (3635280).

Almost surely, 2^25850840 is an apocalyptic number.

25850840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25850840 is an abundant number, since it is smaller than the sum of its proper divisors (32313640).

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

25850840 is a wasteful number, since it uses less digits than its factorization.

25850840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646282 (or 646278 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 25850840 is about 5084.3721342954. The cubic root of 25850840 is about 295.6819996113.

The spelling of 25850840 in words is "twenty-five million, eight hundred fifty thousand, eight hundred forty".