25856390 has 32 divisors (see below), whose sum is σ = 53455680. Its totient is φ = 8820864.

The previous prime is 25856353. The next prime is 25856401. The reversal of 25856390 is 9365852.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15224 + ... + 16836.

It is an arithmetic number, because the mean of its divisors is an integer number (1670490).

Almost surely, 2^25856390 is an apocalyptic number.

25856390 is an abundant number, since it is smaller than the sum of its proper divisors (27599290).

25856390 is a wasteful number, since it uses less digits than its factorization.

25856390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 25856390 is about 5084.9178951090. The cubic root of 25856390 is about 295.7031584037.

The spelling of 25856390 in words is "twenty-five million, eight hundred fifty-six thousand, three hundred ninety".