25652040 has 64 divisors (see below), whose sum is σ = 77362560. Its totient is φ = 6804480.

The previous prime is 25652023. The next prime is 25652041. The reversal of 25652040 is 4025652.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25652040.

It is not an unprimeable number, because it can be changed into a prime (25652041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28477 + ... + 29363.

It is an arithmetic number, because the mean of its divisors is an integer number (1208790).

Almost surely, 2^25652040 is an apocalyptic number.

25652040 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 25652040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38681280).

25652040 is an abundant number, since it is smaller than the sum of its proper divisors (51710520).

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

25652040 is a wasteful number, since it uses less digits than its factorization.

25652040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 25652040 is about 5064.7842994544. The cubic root of 25652040 is about 294.9220899303.

Adding to 25652040 its reverse (4025652), we get a palindrome (29677692).

The spelling of 25652040 in words is "twenty-five million, six hundred fifty-two thousand, forty".