25278888 has 64 divisors (see below), whose sum is σ = 66424320. Its totient is φ = 8006400.

The previous prime is 25278887. The next prime is 25278889. The reversal of 25278888 is 88887252.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25278887) and next prime (25278889).

It is not an unprimeable number, because it can be changed into a prime (25278887) 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 15 ways as a sum of consecutive naturals, for example, 45106 + ... + 45662.

It is an arithmetic number, because the mean of its divisors is an integer number (1037880).

Almost surely, 2^25278888 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 25278888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33212160).

25278888 is an abundant number, since it is smaller than the sum of its proper divisors (41145432).

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

25278888 is a wasteful number, since it uses less digits than its factorization.

25278888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 654 counting only the distinct ones).

The product of its digits is 573440, while the sum is 48.

The square root of 25278888 is about 5027.8114523120. The cubic root of 25278888 is about 293.4850535144.

The spelling of 25278888 in words is "twenty-five million, two hundred seventy-eight thousand, eight hundred eighty-eight".