25778836 has 12 divisors (see below), whose sum is σ = 45560340. Its totient is φ = 12761600.

The previous prime is 25778833. The next prime is 25778897. The reversal of 25778836 is 63887752.

It can be written as a sum of positive squares in 2 ways, for example, as 11262736 + 14516100 = 3356^2 + 3810^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25778833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31501 + ... + 32308.

It is an arithmetic number, because the mean of its divisors is an integer number (3796695).

Almost surely, 2^25778836 is an apocalyptic number.

It is an amenable number.

25778836 is a deficient number, since it is larger than the sum of its proper divisors (19781504).

25778836 is a wasteful number, since it uses less digits than its factorization.

25778836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63914 (or 63912 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 25778836 is about 5077.2862830453. The cubic root of 25778836 is about 295.4072169941.

The spelling of 25778836 in words is "twenty-five million, seven hundred seventy-eight thousand, eight hundred thirty-six".