25580828 has 48 divisors (see below), whose sum is σ = 56899584. Its totient is φ = 9789120.

The previous prime is 25580809. The next prime is 25580833. The reversal of 25580828 is 82808552.

It is a super-2 number, since 2×25580828² = 1308757522331168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25580791 and 25580800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10151 + ... + 12417.

It is an arithmetic number, because the mean of its divisors is an integer number (1185408).

Almost surely, 2^25580828 is an apocalyptic number.

25580828 is a gapful number since it is divisible by the number (28) 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 25580828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28449792).

25580828 is an abundant number, since it is smaller than the sum of its proper divisors (31318756).

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

25580828 is a wasteful number, since it uses less digits than its factorization.

25580828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322 (or 2320 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 38.

The square root of 25580828 is about 5057.7493018140. The cubic root of 25580828 is about 294.6489283381.

The spelling of 25580828 in words is "twenty-five million, five hundred eighty thousand, eight hundred twenty-eight".