25805016 has 48 divisors (see below), whose sum is σ = 70691400. Its totient is φ = 8502912.

The previous prime is 25805009. The next prime is 25805023. The reversal of 25805016 is 61050852.

It is an interprime number because it is at equal distance from previous prime (25805009) and next prime (25805023).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4395 + ... + 8421.

Almost surely, 2^25805016 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 25805016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35345700).

25805016 is an abundant number, since it is smaller than the sum of its proper divisors (44886384).

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

25805016 is a wasteful number, since it uses less digits than its factorization.

25805016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128 (or 4121 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 25805016 is about 5079.8637777011. The cubic root of 25805016 is about 295.5071845849.

Adding to 25805016 its reverse (61050852), we get a palindrome (86855868).

The spelling of 25805016 in words is "twenty-five million, eight hundred five thousand, sixteen".