265567380 has 96 divisors (see below), whose sum is σ = 808956288. Its totient is φ = 64704000.

The previous prime is 265567369. The next prime is 265567391. The reversal of 265567380 is 83765562.

It is an interprime number because it is at equal distance from previous prime (265567369) and next prime (265567391).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77095 + ... + 80465.

It is an arithmetic number, because the mean of its divisors is an integer number (8426628).

Almost surely, 2^265567380 is an apocalyptic number.

265567380 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 265567380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404478144).

265567380 is an abundant number, since it is smaller than the sum of its proper divisors (543388908).

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

265567380 is a wasteful number, since it uses less digits than its factorization.

265567380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497 (or 3495 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 265567380 is about 16296.2382162265. The cubic root of 265567380 is about 642.7739135989.

It can be divided in two parts, 265 and 567380, that added together give a triangular number (567645 = T₁₀₆₅).

The spelling of 265567380 in words is "two hundred sixty-five million, five hundred sixty-seven thousand, three hundred eighty".