25778610 has 96 divisors (see below), whose sum is σ = 78781248. Its totient is φ = 5765760.

The previous prime is 25778591. The next prime is 25778633. The reversal of 25778610 is 1687752.

25778610 is a `hidden beast` number, since 2 + 577 + 86 + 1 + 0 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11869 + ... + 13871.

It is an arithmetic number, because the mean of its divisors is an integer number (820638).

Almost surely, 2^25778610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25778610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39390624).

25778610 is an abundant number, since it is smaller than the sum of its proper divisors (53002638).

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

25778610 is a wasteful number, since it uses less digits than its factorization.

25778610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040 (or 2037 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 25778610 is about 5077.2640270130. The cubic root of 25778610 is about 295.4063537249.

The spelling of 25778610 in words is "twenty-five million, seven hundred seventy-eight thousand, six hundred ten".