25547940 has 288 divisors, whose sum is σ = 96526080. Its totient is φ = 5575680.

The previous prime is 25547939. The next prime is 25547941. The reversal of 25547940 is 4974552.

25547940 is a `hidden beast` number, since 25 + 547 + 94 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (25547939) and next prime (25547941).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25547895 and 25547904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25547941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1110769 + ... + 1110791.

It is an arithmetic number, because the mean of its divisors is an integer number (335160).

Almost surely, 2^25547940 is an apocalyptic number.

25547940 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 25547940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48263040).

25547940 is an abundant number, since it is smaller than the sum of its proper divisors (70978140).

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

25547940 is a wasteful number, since it uses less digits than its factorization.

25547940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 25547940 is about 5054.4970076161. The cubic root of 25547940 is about 294.5226023548.

The spelling of 25547940 in words is "twenty-five million, five hundred forty-seven thousand, nine hundred forty".