25988445 has 80 divisors (see below), whose sum is σ = 54362880. Its totient is φ = 11632896.

The previous prime is 25988441. The next prime is 25988453. The reversal of 25988445 is 54488952.

25988445 is a nontrivial binomial coefficient, being equal to C(7210, 2).

It is not a de Polignac number, because 25988445 - 2² = 25988441 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 25988445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25988441) 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 79 ways as a sum of consecutive naturals, for example, 252264 + ... + 252366.

It is an arithmetic number, because the mean of its divisors is an integer number (679536).

Almost surely, 2^25988445 is an apocalyptic number.

25988445 is the 7209-th triangular number and also the 3605-th hexagonal number.

It is an amenable number.

25988445 is an abundant number, since it is smaller than the sum of its proper divisors (28374435).

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

25988445 is a wasteful number, since it uses less digits than its factorization.

25988445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 207 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 25988445 is about 5097.8863267044. The cubic root of 25988445 is about 296.2057136171.

The spelling of 25988445 in words is "twenty-five million, nine hundred eighty-eight thousand, four hundred forty-five".