25284820 has 96 divisors (see below), whose sum is σ = 63866880. Its totient is φ = 8300160.

The previous prime is 25284793. The next prime is 25284821. The reversal of 25284820 is 2848252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25284821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96009 + ... + 96271.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^25284820 is an apocalyptic number.

25284820 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 25284820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31933440).

25284820 is an abundant number, since it is smaller than the sum of its proper divisors (38582060).

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

25284820 is a wasteful number, since it uses less digits than its factorization.

25284820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 25284820 is about 5028.4013364090. The cubic root of 25284820 is about 293.5080083371.

The spelling of 25284820 in words is "twenty-five million, two hundred eighty-four thousand, eight hundred twenty".