25540548 has 48 divisors (see below), whose sum is σ = 65432640. Its totient is φ = 7689600.

The previous prime is 25540547. The next prime is 25540549. The reversal of 25540548 is 84504552.

It is an interprime number because it is at equal distance from previous prime (25540547) and next prime (25540549).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (25540547) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23358 + ... + 24426.

It is an arithmetic number, because the mean of its divisors is an integer number (1363180).

Almost surely, 2^25540548 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25540548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32716320).

25540548 is an abundant number, since it is smaller than the sum of its proper divisors (39892092).

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

25540548 is a wasteful number, since it uses less digits than its factorization.

25540548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

The square root of 25540548 is about 5053.7657246849. The cubic root of 25540548 is about 294.4941940489.

The spelling of 25540548 in words is "twenty-five million, five hundred forty thousand, five hundred forty-eight".