25778872 has 16 divisors (see below), whose sum is σ = 55240560. Its totient is φ = 11048064.

The previous prime is 25778833. The next prime is 25778897. The reversal of 25778872 is 27887752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230113 + ... + 230224.

It is an arithmetic number, because the mean of its divisors is an integer number (3452535).

Almost surely, 2^25778872 is an apocalyptic number.

It is an amenable number.

25778872 is an abundant number, since it is smaller than the sum of its proper divisors (29461688).

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

25778872 is a wasteful number, since it uses less digits than its factorization.

25778872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460350 (or 460346 counting only the distinct ones).

The product of its digits is 439040, while the sum is 46.

The square root of 25778872 is about 5077.2898282450. The cubic root of 25778872 is about 295.4073545056.

It can be divided in two parts, 2577 and 8872, that added together give a square (11449 = 107²).

The spelling of 25778872 in words is "twenty-five million, seven hundred seventy-eight thousand, eight hundred seventy-two".