25218928 has 60 divisors (see below), whose sum is σ = 59865960. Its totient is φ = 10233216.

The previous prime is 25218923. The next prime is 25218929. The reversal of 25218928 is 82981252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25218923) 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, 14050 + ... + 15742.

It is an arithmetic number, because the mean of its divisors is an integer number (997766).

Almost surely, 2^25218928 is an apocalyptic number.

25218928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25218928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29932980).

25218928 is an abundant number, since it is smaller than the sum of its proper divisors (34647032).

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

25218928 is a wasteful number, since it uses less digits than its factorization.

25218928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734 (or 1721 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 25218928 is about 5021.8450792513. The cubic root of 25218928 is about 293.2528268507.

It can be divided in two parts, 2521 and 8928, that added together give a square (11449 = 107²).

The spelling of 25218928 in words is "twenty-five million, two hundred eighteen thousand, nine hundred twenty-eight".