25802040 has 96 divisors (see below), whose sum is σ = 85130640. Its totient is φ = 6251520.

The previous prime is 25802033. The next prime is 25802041. The reversal of 25802040 is 4020852.

It is a junction number, because it is equal to n+sod(n) for n = 25801998 and 25802016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25802041) 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, 13632 + ... + 15408.

Almost surely, 2^25802040 is an apocalyptic number.

25802040 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 25802040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42565320).

25802040 is an abundant number, since it is smaller than the sum of its proper divisors (59328600).

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

25802040 is a wasteful number, since it uses less digits than its factorization.

25802040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813 (or 1798 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 25802040 is about 5079.5708480146. The cubic root of 25802040 is about 295.4958242200.

Adding to 25802040 its reverse (4020852), we get a palindrome (29822892).

The spelling of 25802040 in words is "twenty-five million, eight hundred two thousand, forty".