265008780 has 96 divisors (see below), whose sum is σ = 827064000. Its totient is φ = 70447104.

The previous prime is 265008769. The next prime is 265008811. The reversal of 265008780 is 87800562.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241914 + ... + 243006.

It is an arithmetic number, because the mean of its divisors is an integer number (8615250).

Almost surely, 2^265008780 is an apocalyptic number.

265008780 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 265008780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413532000).

265008780 is an abundant number, since it is smaller than the sum of its proper divisors (562055220).

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

265008780 is a wasteful number, since it uses less digits than its factorization.

265008780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 265008780 is about 16279.0902694223. The cubic root of 265008780 is about 642.3229225301.

The spelling of 265008780 in words is "two hundred sixty-five million, eight thousand, seven hundred eighty".