25550856 has 64 divisors (see below), whose sum is σ = 73440000. Its totient is φ = 8221248.

The previous prime is 25550849. The next prime is 25550857. The reversal of 25550856 is 65805552.

25550856 is a `hidden beast` number, since 25 + 550 + 85 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 25550856.

It is not an unprimeable number, because it can be changed into a prime (25550857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4225 + ... + 8303.

It is an arithmetic number, because the mean of its divisors is an integer number (1147500).

Almost surely, 2^25550856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25550856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36720000).

25550856 is an abundant number, since it is smaller than the sum of its proper divisors (47889144).

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

25550856 is a wasteful number, since it uses less digits than its factorization.

25550856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123 (or 4113 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The square root of 25550856 is about 5054.7854553878. The cubic root of 25550856 is about 294.5338073708.

The spelling of 25550856 in words is "twenty-five million, five hundred fifty thousand, eight hundred fifty-six".