25000008 has 64 divisors (see below), whose sum is σ = 68627520. Its totient is φ = 7526400.

The previous prime is 24999983. The next prime is 25000009. The reversal of 25000008 is 80000052.

It is not an unprimeable number, because it can be changed into a prime (25000009) 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 15 ways as a sum of consecutive naturals, for example, 74016 + ... + 74352.

It is an arithmetic number, because the mean of its divisors is an integer number (1072305).

Almost surely, 2^25000008 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 25000008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34313760).

25000008 is an abundant number, since it is smaller than the sum of its proper divisors (43627512).

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

25000008 is a wasteful number, since it uses less digits than its factorization.

25000008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 25000008 is about 5000.0007999999. Note that the first 3 decimals coincide. The cubic root of 25000008 is about 292.4018050108.

The spelling of 25000008 in words is "twenty-five million, eight", and thus it is an aban number and an uban number.