25798500 has 360 divisors, whose sum is σ = 105441336. Its totient is φ = 5443200.

The previous prime is 25798427. The next prime is 25798511. The reversal of 25798500 is 589752.

25798500 is a `hidden beast` number, since 2 + 579 + 85 + 0 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4064256 + 21734244 = 2016^2 + 4662^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1984494 + ... + 1984506.

Almost surely, 2^25798500 is an apocalyptic number.

25798500 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 25798500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52720668).

25798500 is an abundant number, since it is smaller than the sum of its proper divisors (79642836).

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

25798500 is a wasteful number, since it uses less digits than its factorization.

25798500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 25798500 is about 5079.2223814281. Note that the first 3 decimals coincide. The cubic root of 25798500 is about 295.4823097452.

The spelling of 25798500 in words is "twenty-five million, seven hundred ninety-eight thousand, five hundred".