25695720 has 96 divisors (see below), whose sum is σ = 84282120. Its totient is φ = 6789120.

The previous prime is 25695707. The next prime is 25695727. The reversal of 25695720 is 2759652.

25695720 is a `hidden beast` number, since 25 + 69 + 572 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19131876 + 6563844 = 4374^2 + 2562^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (25695727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49060 + ... + 49580.

Almost surely, 2^25695720 is an apocalyptic number.

25695720 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 25695720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42141060).

25695720 is an abundant number, since it is smaller than the sum of its proper divisors (58586400).

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

25695720 is a wasteful number, since it uses less digits than its factorization.

25695720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 25695720 is about 5069.0945937120. The cubic root of 25695720 is about 295.0893916590.

The spelling of 25695720 in words is "twenty-five million, six hundred ninety-five thousand, seven hundred twenty".