265239980 has 12 divisors (see below), whose sum is σ = 557004000. Its totient is φ = 106095984.

The previous prime is 265239959. The next prime is 265240007. The reversal of 265239980 is 89932562.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6630980 + ... + 6631019.

It is an arithmetic number, because the mean of its divisors is an integer number (46417000).

Almost surely, 2^265239980 is an apocalyptic number.

265239980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265239980 is an abundant number, since it is smaller than the sum of its proper divisors (291764020).

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

265239980 is a wasteful number, since it uses less digits than its factorization.

265239980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13262008 (or 13262006 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 265239980 is about 16286.1898552117. The cubic root of 265239980 is about 642.5096608640.

The spelling of 265239980 in words is "two hundred sixty-five million, two hundred thirty-nine thousand, nine hundred eighty".