25506740 has 96 divisors (see below), whose sum is σ = 66232320. Its totient is φ = 8055936.

The previous prime is 25506739. The next prime is 25506751. The reversal of 25506740 is 4760552.

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, 114269 + ... + 114491.

It is an arithmetic number, because the mean of its divisors is an integer number (689920).

Almost surely, 2^25506740 is an apocalyptic number.

25506740 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 25506740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33116160).

25506740 is an abundant number, since it is smaller than the sum of its proper divisors (40725580).

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

25506740 is a wasteful number, since it uses less digits than its factorization.

25506740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 25506740 is about 5050.4197845328. The cubic root of 25506740 is about 294.3641961076.

The spelling of 25506740 in words is "twenty-five million, five hundred six thousand, seven hundred forty".