25533340 has 96 divisors (see below), whose sum is σ = 66931200. Its totient is φ = 7983360.

The previous prime is 25533323. The next prime is 25533377. The reversal of 25533340 is 4333552.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76975 + ... + 77305.

It is an arithmetic number, because the mean of its divisors is an integer number (697200).

Almost surely, 2^25533340 is an apocalyptic number.

25533340 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 25533340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33465600).

25533340 is an abundant number, since it is smaller than the sum of its proper divisors (41397860).

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

25533340 is a wasteful number, since it uses less digits than its factorization.

25533340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 25533340 is about 5053.0525427706. The cubic root of 25533340 is about 294.4664875973.

Adding to 25533340 its reverse (4333552), we get a palindrome (29866892).

The spelling of 25533340 in words is "twenty-five million, five hundred thirty-three thousand, three hundred forty".