25827864 has 64 divisors (see below), whose sum is σ = 68428800. Its totient is φ = 8109696.

The previous prime is 25827853. The next prime is 25827869. The reversal of 25827864 is 46872852.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25827869) 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, 29497 + ... + 30359.

It is an arithmetic number, because the mean of its divisors is an integer number (1069200).

Almost surely, 2^25827864 is an apocalyptic number.

25827864 is a gapful number since it is divisible by the number (24) 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 25827864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34214400).

25827864 is an abundant number, since it is smaller than the sum of its proper divisors (42600936).

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

25827864 is a wasteful number, since it uses less digits than its factorization.

25827864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944 (or 940 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 25827864 is about 5082.1121593290. The cubic root of 25827864 is about 295.5943737893.

The spelling of 25827864 in words is "twenty-five million, eight hundred twenty-seven thousand, eight hundred sixty-four".