25334440 has 32 divisors (see below), whose sum is σ = 58844160. Its totient is φ = 9806400.

The previous prime is 25334417. The next prime is 25334447. The reversal of 25334440 is 4443352.

It is a super-2 number, since 2×25334440² = 1283667700227200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (25334447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8976 + ... + 11455.

It is an arithmetic number, because the mean of its divisors is an integer number (1838880).

Almost surely, 2^25334440 is an apocalyptic number.

25334440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25334440 is an abundant number, since it is smaller than the sum of its proper divisors (33509720).

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

25334440 is a wasteful number, since it uses less digits than its factorization.

25334440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20473 (or 20469 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 25334440 is about 5033.3328918322. The cubic root of 25334440 is about 293.6998803883.

Adding to 25334440 its reverse (4443352), we get a palindrome (29777792).

The spelling of 25334440 in words is "twenty-five million, three hundred thirty-four thousand, four hundred forty".