25947540 has 144 divisors (see below), whose sum is σ = 86224320. Its totient is φ = 6531840.

The previous prime is 25947539. The next prime is 25947557. The reversal of 25947540 is 4574952.

25947540 is a `hidden beast` number, since 25 + 94 + 7 + 540 = 666.

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 = 25947495 and 25947504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92200 + ... + 92480.

It is an arithmetic number, because the mean of its divisors is an integer number (598780).

Almost surely, 2^25947540 is an apocalyptic number.

25947540 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 25947540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43112160).

25947540 is an abundant number, since it is smaller than the sum of its proper divisors (60276780).

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

25947540 is a wasteful number, since it uses less digits than its factorization.

25947540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 310 counting only the distinct ones).

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

The square root of 25947540 is about 5093.8727899311. The cubic root of 25947540 is about 296.0502258331.

The spelling of 25947540 in words is "twenty-five million, nine hundred forty-seven thousand, five hundred forty".