25985740 has 48 divisors (see below), whose sum is σ = 61598880. Its totient is φ = 9121280.

The previous prime is 25985693. The next prime is 25985747. The reversal of 25985740 is 4758952.

It is a junction number, because it is equal to n+sod(n) for n = 25985693 and 25985702.

It is not an unprimeable number, because it can be changed into a prime (25985747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4344 + ... + 8416.

It is an arithmetic number, because the mean of its divisors is an integer number (1283310).

Almost surely, 2^25985740 is an apocalyptic number.

25985740 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 25985740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30799440).

25985740 is an abundant number, since it is smaller than the sum of its proper divisors (35613140).

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

25985740 is a wasteful number, since it uses less digits than its factorization.

25985740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4122 (or 4120 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 25985740 is about 5097.6210137671. The cubic root of 25985740 is about 296.1954364310.

It can be divided in two parts, 2598 and 5740, that added together give a palindrome (8338).

The spelling of 25985740 in words is "twenty-five million, nine hundred eighty-five thousand, seven hundred forty".