25891026 has 48 divisors (see below), whose sum is σ = 61374144. Its totient is φ = 7132608.

The previous prime is 25891013. The next prime is 25891037. The reversal of 25891026 is 62019852.

25891026 is nontrivially palindromic in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34956 + ... + 35688.

It is an arithmetic number, because the mean of its divisors is an integer number (1278628).

Almost surely, 2^25891026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25891026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30687072).

25891026 is an abundant number, since it is smaller than the sum of its proper divisors (35483118).

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

25891026 is a wasteful number, since it uses less digits than its factorization.

25891026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 25891026 is about 5088.3225133633. The cubic root of 25891026 is about 295.8351361569.

It can be divided in two parts, 2 and 5891026, that added together give a triangular number (5891028 = T₃₄₃₂).

The spelling of 25891026 in words is "twenty-five million, eight hundred ninety-one thousand, twenty-six".