25540860 has 24 divisors (see below), whose sum is σ = 71514576. Its totient is φ = 6810880.

The previous prime is 25540847. The next prime is 25540873. The reversal of 25540860 is 6804552.

It is an interprime number because it is at equal distance from previous prime (25540847) and next prime (25540873).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212781 + ... + 212900.

It is an arithmetic number, because the mean of its divisors is an integer number (2979774).

Almost surely, 2^25540860 is an apocalyptic number.

25540860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25540860 is an abundant number, since it is smaller than the sum of its proper divisors (45973716).

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

25540860 is a wasteful number, since it uses less digits than its factorization.

25540860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425693 (or 425691 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 25540860 is about 5053.7965926618. The cubic root of 25540860 is about 294.4953932115.

The spelling of 25540860 in words is "twenty-five million, five hundred forty thousand, eight hundred sixty".