25553340 has 96 divisors (see below), whose sum is σ = 80640000. Its totient is φ = 6716736.

The previous prime is 25553287. The next prime is 25553357. The reversal of 25553340 is 4335552.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42361 + ... + 42959.

It is an arithmetic number, because the mean of its divisors is an integer number (840000).

Almost surely, 2^25553340 is an apocalyptic number.

25553340 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 25553340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40320000).

25553340 is an abundant number, since it is smaller than the sum of its proper divisors (55086660).

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

25553340 is a wasteful number, since it uses less digits than its factorization.

25553340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 25553340 is about 5055.0311571740. The cubic root of 25553340 is about 294.5433517121.

Adding to 25553340 its reverse (4335552), we get a palindrome (29888892).

The spelling of 25553340 in words is "twenty-five million, five hundred fifty-three thousand, three hundred forty".