25939560 has 128 divisors (see below), whose sum is σ = 84787200. Its totient is φ = 6324480.

The previous prime is 25939549. The next prime is 25939567. The reversal of 25939560 is 6593952.

It is not an unprimeable number, because it can be changed into a prime (25939567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70497 + ... + 70863.

It is an arithmetic number, because the mean of its divisors is an integer number (662400).

Almost surely, 2^25939560 is an apocalyptic number.

25939560 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 25939560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42393600).

25939560 is an abundant number, since it is smaller than the sum of its proper divisors (58847640).

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

25939560 is a wasteful number, since it uses less digits than its factorization.

25939560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 39.

The square root of 25939560 is about 5093.0894356962. The cubic root of 25939560 is about 296.0198732700.

The spelling of 25939560 in words is "twenty-five million, nine hundred thirty-nine thousand, five hundred sixty".