25446816 has 72 divisors (see below), whose sum is σ = 72972900. Its totient is φ = 8411136.

The previous prime is 25446793. The next prime is 25446823. The reversal of 25446816 is 61864452.

It can be written as a sum of positive squares in 2 ways, for example, as 24800400 + 646416 = 4980^2 + 804^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42616 + ... + 43208.

Almost surely, 2^25446816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25446816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36486450).

25446816 is an abundant number, since it is smaller than the sum of its proper divisors (47526084).

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

25446816 is a wasteful number, since it uses less digits than its factorization.

25446816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 747 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 25446816 is about 5044.4837198667. The cubic root of 25446816 is about 294.1334948386.

It can be divided in two parts, 25446 and 816, that added together give a palindrome (26262).

The spelling of 25446816 in words is "twenty-five million, four hundred forty-six thousand, eight hundred sixteen".