25691952 has 160 divisors (see below), whose sum is σ = 82494720. Its totient is φ = 6773760.

The previous prime is 25691923. The next prime is 25691969. The reversal of 25691952 is 25919652.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 25691952.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130318 + ... + 130514.

It is an arithmetic number, because the mean of its divisors is an integer number (515592).

Almost surely, 2^25691952 is an apocalyptic number.

25691952 is a gapful number since it is divisible by the number (22) 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 25691952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41247360).

25691952 is an abundant number, since it is smaller than the sum of its proper divisors (56802768).

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

25691952 is a wasteful number, since it uses less digits than its factorization.

25691952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 245 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 25691952 is about 5068.7229160805. The cubic root of 25691952 is about 295.0749670624.

The spelling of 25691952 in words is "twenty-five million, six hundred ninety-one thousand, nine hundred fifty-two".