265000000 has 112 divisors (see below), whose sum is σ = 669724848. Its totient is φ = 104000000.

The previous prime is 264999983. The next prime is 265000007. The reversal of 265000000 is 562.

It can be written as a sum of positive squares in 8 ways, for example, as 228130816 + 36869184 = 15104^2 + 6072^2 .

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265000007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4999974 + ... + 5000026.

Almost surely, 2^265000000 is an apocalyptic number.

265000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334862424).

265000000 is an abundant number, since it is smaller than the sum of its proper divisors (404724848).

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

265000000 is an frugal number, since it uses more digits than its factorization.

265000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 265000000 is about 16278.8205960997. The cubic root of 265000000 is about 642.3158288562.

Adding to 265000000 its reverse (562), we get a palindrome (265000562).

The spelling of 265000000 in words is "two hundred sixty-five million", and thus it is an aban number.