265296388 has 72 divisors (see below), whose sum is σ = 569963520. Its totient is φ = 107573760.

The previous prime is 265296371. The next prime is 265296389. The reversal of 265296388 is 883692562.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265296389) 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 23 ways as a sum of consecutive naturals, for example, 285108 + ... + 286036.

It is an arithmetic number, because the mean of its divisors is an integer number (7916160).

Almost surely, 2^265296388 is an apocalyptic number.

265296388 is a gapful number since it is divisible by the number (28) 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 265296388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284981760).

265296388 is an abundant number, since it is smaller than the sum of its proper divisors (304667132).

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

265296388 is a wasteful number, since it uses less digits than its factorization.

265296388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 1016 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 265296388 is about 16287.9215371391. The cubic root of 265296388 is about 642.5552046718. Note that the first 3 decimals are identical.

The spelling of 265296388 in words is "two hundred sixty-five million, two hundred ninety-six thousand, three hundred eighty-eight".