25520940 has 96 divisors (see below), whose sum is σ = 80156160. Its totient is φ = 6740928.

The previous prime is 25520939. The next prime is 25520959. The reversal of 25520940 is 4902552.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 90039 + ... + 90321.

It is an arithmetic number, because the mean of its divisors is an integer number (834960).

Almost surely, 2^25520940 is an apocalyptic number.

25520940 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 25520940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40078080).

25520940 is an abundant number, since it is smaller than the sum of its proper divisors (54635220).

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

25520940 is a wasteful number, since it uses less digits than its factorization.

25520940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 25520940 is about 5051.8254126603. The cubic root of 25520940 is about 294.4188116868.

The spelling of 25520940 in words is "twenty-five million, five hundred twenty thousand, nine hundred forty".