25315860 has 72 divisors (see below), whose sum is σ = 72944928. Its totient is φ = 6560000.

The previous prime is 25315841. The next prime is 25315909. The reversal of 25315860 is 6851352.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

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 23 ways as a sum of consecutive naturals, for example, 100735 + ... + 100985.

It is an arithmetic number, because the mean of its divisors is an integer number (1013124).

Almost surely, 2^25315860 is an apocalyptic number.

25315860 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 25315860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36472464).

25315860 is an abundant number, since it is smaller than the sum of its proper divisors (47629068).

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

25315860 is a wasteful number, since it uses less digits than its factorization.

25315860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 25315860 is about 5031.4868577787. The cubic root of 25315860 is about 293.6280640736.

The spelling of 25315860 in words is "twenty-five million, three hundred fifteen thousand, eight hundred sixty".