25648980 has 96 divisors (see below), whose sum is σ = 82785024. Its totient is φ = 5812224.

The previous prime is 25648969. The next prime is 25648991. The reversal of 25648980 is 8984652.

It is an interprime number because it is at equal distance from previous prime (25648969) and next prime (25648991).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72484 + ... + 72836.

It is an arithmetic number, because the mean of its divisors is an integer number (862344).

Almost surely, 2^25648980 is an apocalyptic number.

25648980 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 25648980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41392512).

25648980 is an abundant number, since it is smaller than the sum of its proper divisors (57136044).

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

25648980 is a wasteful number, since it uses less digits than its factorization.

25648980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 25648980 is about 5064.4822045299. The cubic root of 25648980 is about 294.9103625006.

The spelling of 25648980 in words is "twenty-five million, six hundred forty-eight thousand, nine hundred eighty".