25804530 has 48 divisors (see below), whose sum is σ = 67541760. Its totient is φ = 6835104.

The previous prime is 25804433. The next prime is 25804543. The reversal of 25804530 is 3540852.

It is a junction number, because it is equal to n+sod(n) for n = 25804494 and 25804503.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13791 + ... + 15549.

It is an arithmetic number, because the mean of its divisors is an integer number (1407120).

Almost surely, 2^25804530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25804530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33770880).

25804530 is an abundant number, since it is smaller than the sum of its proper divisors (41737230).

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

25804530 is a wasteful number, since it uses less digits than its factorization.

25804530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 25804530 is about 5079.8159415475. The cubic root of 25804530 is about 295.5053294237.

The spelling of 25804530 in words is "twenty-five million, eight hundred four thousand, five hundred thirty".