25439036 has 36 divisors (see below), whose sum is σ = 52313688. Its totient is φ = 10791648.

The previous prime is 25439033. The next prime is 25439047. The reversal of 25439036 is 63093452.

It is a junction number, because it is equal to n+sod(n) for n = 25438993 and 25439011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25439033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20366 + ... + 21578.

It is an arithmetic number, because the mean of its divisors is an integer number (1453158).

Almost surely, 2^25439036 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 25439036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26156844).

25439036 is an abundant number, since it is smaller than the sum of its proper divisors (26874652).

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

25439036 is a wasteful number, since it uses less digits than its factorization.

25439036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 25439036 is about 5043.7125215460. The cubic root of 25439036 is about 294.1035160803.

The spelling of 25439036 in words is "twenty-five million, four hundred thirty-nine thousand, thirty-six".