265555380 has 24 divisors (see below), whose sum is σ = 743555232. Its totient is φ = 70814752.

The previous prime is 265555379. The next prime is 265555427. The reversal of 265555380 is 83555562.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2212902 + ... + 2213021.

It is an arithmetic number, because the mean of its divisors is an integer number (30981468).

Almost surely, 2^265555380 is an apocalyptic number.

265555380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265555380 is an abundant number, since it is smaller than the sum of its proper divisors (477999852).

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

265555380 is a wasteful number, since it uses less digits than its factorization.

265555380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425935 (or 4425933 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 39.

The square root of 265555380 is about 16295.8700289368. The cubic root of 265555380 is about 642.7642319340.

The spelling of 265555380 in words is "two hundred sixty-five million, five hundred fifty-five thousand, three hundred eighty".