25155856 has 40 divisors (see below), whose sum is σ = 54621504. Its totient is φ = 11122560.

The previous prime is 25155853. The next prime is 25155863. The reversal of 25155856 is 65855152.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (25155853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4581 + ... + 8443.

Almost surely, 2^25155856 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 25155856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27310752).

25155856 is an abundant number, since it is smaller than the sum of its proper divisors (29465648).

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

25155856 is a wasteful number, since it uses less digits than its factorization.

25155856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919 (or 3913 counting only the distinct ones).

The product of its digits is 60000, while the sum is 37.

The square root of 25155856 is about 5015.5613843318. The cubic root of 25155856 is about 293.0081497421.

The spelling of 25155856 in words is "twenty-five million, one hundred fifty-five thousand, eight hundred fifty-six".