25813026 has 64 divisors (see below), whose sum is σ = 59875200. Its totient is φ = 8236800.

The previous prime is 25813009. The next prime is 25813027. The reversal of 25813026 is 62031852.

It is a super-2 number, since 2×25813026² = 1332624622553352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (25813027) 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, 196981 + ... + 197111.

It is an arithmetic number, because the mean of its divisors is an integer number (935550).

Almost surely, 2^25813026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25813026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29937600).

25813026 is an abundant number, since it is smaller than the sum of its proper divisors (34062174).

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

25813026 is a wasteful number, since it uses less digits than its factorization.

25813026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 25813026 is about 5080.6521234975. The cubic root of 25813026 is about 295.5377570348.

Adding to 25813026 its reverse (62031852), we get a palindrome (87844878).

The spelling of 25813026 in words is "twenty-five million, eight hundred thirteen thousand, twenty-six".