25884540 has 144 divisors (see below), whose sum is σ = 90810720. Its totient is φ = 5898240.

The previous prime is 25884533. The next prime is 25884553. The reversal of 25884540 is 4548852.

It is a super-2 number, since 2×25884540² = 1340018822023200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25884495 and 25884504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33276 + ... + 34044.

It is an arithmetic number, because the mean of its divisors is an integer number (630630).

Almost surely, 2^25884540 is an apocalyptic number.

25884540 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 25884540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45405360).

25884540 is an abundant number, since it is smaller than the sum of its proper divisors (64926180).

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

25884540 is a wasteful number, since it uses less digits than its factorization.

25884540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 25884540 is about 5087.6851317667. The cubic root of 25884540 is about 295.8104307249.

The spelling of 25884540 in words is "twenty-five million, eight hundred eighty-four thousand, five hundred forty".