25723040 has 144 divisors (see below), whose sum is σ = 75238632. Its totient is φ = 8257536.

The previous prime is 25723013. The next prime is 25723043. The reversal of 25723040 is 4032752.

25723040 is nontrivially palindromic in base 9 and base 13.

25723040 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 4 ways, for example, as 20830096 + 4892944 = 4564^2 + 2212^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25722997 and 25723015.

It is not an unprimeable number, because it can be changed into a prime (25723043) 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, 133184 + ... + 133376.

Almost surely, 2^25723040 is an apocalyptic number.

25723040 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 25723040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37619316).

25723040 is an abundant number, since it is smaller than the sum of its proper divisors (49515592).

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

25723040 is a wasteful number, since it uses less digits than its factorization.

25723040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 25723040 is about 5071.7886391292. The cubic root of 25723040 is about 295.1939354860.

Adding to 25723040 its reverse (4032752), we get a palindrome (29755792).

The spelling of 25723040 in words is "twenty-five million, seven hundred twenty-three thousand, forty".