25906386 has 64 divisors (see below), whose sum is σ = 60526080. Its totient is φ = 7309440.

The previous prime is 25906381. The next prime is 25906423. The reversal of 25906386 is 68360952.

It is a super-2 number, since 2×25906386² = 1342281671161992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25906381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91401 + ... + 91683.

It is an arithmetic number, because the mean of its divisors is an integer number (945720).

Almost surely, 2^25906386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25906386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30263040).

25906386 is an abundant number, since it is smaller than the sum of its proper divisors (34619694).

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

25906386 is a wasteful number, since it uses less digits than its factorization.

25906386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 25906386 is about 5089.8316278635. The cubic root of 25906386 is about 295.8936265568.

The spelling of 25906386 in words is "twenty-five million, nine hundred six thousand, three hundred eighty-six".