25554540 has 96 divisors (see below), whose sum is σ = 80640000. Its totient is φ = 5990400.

The previous prime is 25554517. The next prime is 25554569. The reversal of 25554540 is 4545552.

It is a super-2 number, since 2×25554540² = 1306069029223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25554498 and 25554507.

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, 19836 + ... + 21084.

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

Almost surely, 2^25554540 is an apocalyptic number.

25554540 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 25554540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40320000).

25554540 is an abundant number, since it is smaller than the sum of its proper divisors (55085460).

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

25554540 is a wasteful number, since it uses less digits than its factorization.

25554540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 25554540 is about 5055.1498494110. The cubic root of 25554540 is about 294.5479622835.

The spelling of 25554540 in words is "twenty-five million, five hundred fifty-four thousand, five hundred forty".