265998000 has 160 divisors (see below), whose sum is σ = 878372352. Its totient is φ = 69216000.

The previous prime is 265997993. The next prime is 265998017. The reversal of 265998000 is 899562.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 265998000.

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, 257485 + ... + 258515.

Almost surely, 2^265998000 is an apocalyptic number.

265998000 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 265998000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439186176).

265998000 is an abundant number, since it is smaller than the sum of its proper divisors (612374352).

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

265998000 is a wasteful number, since it uses less digits than its factorization.

265998000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100 (or 1084 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 265998000 is about 16309.4451162509. The cubic root of 265998000 is about 643.1211472974.

The spelling of 265998000 in words is "two hundred sixty-five million, nine hundred ninety-eight thousand".