25509848 has 64 divisors (see below), whose sum is σ = 59861760. Its totient is φ = 9922176.

The previous prime is 25509823. The next prime is 25509853. The reversal of 25509848 is 84890552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48515 + ... + 49037.

It is an arithmetic number, because the mean of its divisors is an integer number (935340).

Almost surely, 2^25509848 is an apocalyptic number.

25509848 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 25509848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29930880).

25509848 is an abundant number, since it is smaller than the sum of its proper divisors (34351912).

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

25509848 is a wasteful number, since it uses less digits than its factorization.

25509848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 25509848 is about 5050.7274723548. The cubic root of 25509848 is about 294.3761517288.

The spelling of 25509848 in words is "twenty-five million, five hundred nine thousand, eight hundred forty-eight".