25865478 has 24 divisors (see below), whose sum is σ = 58479408. Its totient is φ = 8246832.

The previous prime is 25865459. The next prime is 25865503. The reversal of 25865478 is 87456852.

25865478 is a `hidden beast` number, since 25 + 86 + 547 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30825 + ... + 31652.

It is an arithmetic number, because the mean of its divisors is an integer number (2436642).

Almost surely, 2^25865478 is an apocalyptic number.

25865478 is an abundant number, since it is smaller than the sum of its proper divisors (32613930).

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

25865478 is a wasteful number, since it uses less digits than its factorization.

25865478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62508 (or 62505 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 25865478 is about 5085.8114396820. The cubic root of 25865478 is about 295.7377989125.

The spelling of 25865478 in words is "twenty-five million, eight hundred sixty-five thousand, four hundred seventy-eight".