25769980 has 48 divisors (see below), whose sum is σ = 56538720. Its totient is φ = 9854208.

The previous prime is 25769971. The next prime is 25769981. The reversal of 25769980 is 8996752.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 25769980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25769981) 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, 90919 + ... + 91201.

It is an arithmetic number, because the mean of its divisors is an integer number (1177890).

Almost surely, 2^25769980 is an apocalyptic number.

25769980 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 25769980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28269360).

25769980 is an abundant number, since it is smaller than the sum of its proper divisors (30768740).

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

25769980 is a wasteful number, since it uses less digits than its factorization.

25769980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 25769980 is about 5076.4140887047. The cubic root of 25769980 is about 295.3733852888.

The spelling of 25769980 in words is "twenty-five million, seven hundred sixty-nine thousand, nine hundred eighty".