25779456 has 108 divisors (see below), whose sum is σ = 75889632. Its totient is φ = 8414208.

The previous prime is 25779451. The next prime is 25779487. The reversal of 25779456 is 65497752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25779451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154285 + ... + 154451.

Almost surely, 2^25779456 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 25779456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37944816).

25779456 is an abundant number, since it is smaller than the sum of its proper divisors (50110176).

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

25779456 is a wasteful number, since it uses less digits than its factorization.

25779456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 239 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 25779456 is about 5077.3473389163. The cubic root of 25779456 is about 295.4095852289.

The spelling of 25779456 in words is "twenty-five million, seven hundred seventy-nine thousand, four hundred fifty-six".