25965980 has 48 divisors (see below), whose sum is σ = 56511840. Its totient is φ = 10015488.

The previous prime is 25965977. The next prime is 25965983. The reversal of 25965980 is 8956952.

It is an interprime number because it is at equal distance from previous prime (25965977) and next prime (25965983).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25965983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93602 + ... + 93878.

It is an arithmetic number, because the mean of its divisors is an integer number (1177330).

Almost surely, 2^25965980 is an apocalyptic number.

25965980 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 25965980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28255920).

25965980 is an abundant number, since it is smaller than the sum of its proper divisors (30545860).

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

25965980 is a wasteful number, since it uses less digits than its factorization.

25965980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 25965980 is about 5095.6824861838. The cubic root of 25965980 is about 296.1203400387.

Subtracting from 25965980 its reverse (8956952), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 25965980 in words is "twenty-five million, nine hundred sixty-five thousand, nine hundred eighty".