25339340728 has 128 divisors (see below), whose sum is σ = 55770624000. Its totient is φ = 10688578560.

The previous prime is 25339340713. The next prime is 25339340729. The reversal of 25339340728 is 82704393352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25339340729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34854301 + ... + 34855027.

It is an arithmetic number, because the mean of its divisors is an integer number (435708000).

Almost surely, 2^25339340728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25339340728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27885312000).

25339340728 is an abundant number, since it is smaller than the sum of its proper divisors (30431283272).

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

25339340728 is a wasteful number, since it uses less digits than its factorization.

25339340728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365 (or 1361 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 25339340728 in words is "twenty-five billion, three hundred thirty-nine million, three hundred forty thousand, seven hundred twenty-eight".