25487940 has 48 divisors (see below), whose sum is σ = 71870400. Its totient is φ = 6748800.

The previous prime is 25487899. The next prime is 25487951. The reversal of 25487940 is 4978452.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7515 + ... + 10365.

It is an arithmetic number, because the mean of its divisors is an integer number (1497300).

Almost surely, 2^25487940 is an apocalyptic number.

25487940 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 25487940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35935200).

25487940 is an abundant number, since it is smaller than the sum of its proper divisors (46382460).

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

25487940 is a wasteful number, since it uses less digits than its factorization.

25487940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012 (or 3010 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 25487940 is about 5048.5582100239. The cubic root of 25487940 is about 294.2918569653.

The spelling of 25487940 in words is "twenty-five million, four hundred eighty-seven thousand, nine hundred forty".