25887880 has 64 divisors (see below), whose sum is σ = 64022400. Its totient is φ = 9377280.

The previous prime is 25887871. The next prime is 25887881. The reversal of 25887880 is 8878852.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 25887880.

It is not an unprimeable number, because it can be changed into a prime (25887881) 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, 16740 + ... + 18220.

It is an arithmetic number, because the mean of its divisors is an integer number (1000350).

Almost surely, 2^25887880 is an apocalyptic number.

25887880 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 25887880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32011200).

25887880 is an abundant number, since it is smaller than the sum of its proper divisors (38134520).

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

25887880 is a wasteful number, since it uses less digits than its factorization.

25887880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534 (or 1530 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 46.

The square root of 25887880 is about 5088.0133647623. The cubic root of 25887880 is about 295.8231534331.

Subtracting from 25887880 its reverse (8878852), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 25887880 in words is "twenty-five million, eight hundred eighty-seven thousand, eight hundred eighty".