25928140 has 96 divisors (see below), whose sum is σ = 65640960. Its totient is φ = 8418816.

The previous prime is 25928131. The next prime is 25928143. The reversal of 25928140 is 4182952.

25928140 = 444² + 445² + ... + 548².

It is not an unprimeable number, because it can be changed into a prime (25928143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355144 + ... + 355216.

It is an arithmetic number, because the mean of its divisors is an integer number (683760).

Almost surely, 2^25928140 is an apocalyptic number.

25928140 is a gapful number since it is divisible by the number (20) 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 25928140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32820480).

25928140 is an abundant number, since it is smaller than the sum of its proper divisors (39712820).

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

25928140 is a wasteful number, since it uses less digits than its factorization.

25928140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 25928140 is about 5091.9681852895. The cubic root of 25928140 is about 295.9764255635.

The spelling of 25928140 in words is "twenty-five million, nine hundred twenty-eight thousand, one hundred forty".