265799040 has 256 divisors, whose sum is σ = 954132480. Its totient is φ = 62447616.

The previous prime is 265799033. The next prime is 265799041. The reversal of 265799040 is 40997562.

It is a junction number, because it is equal to n+sod(n) for n = 265798983 and 265799001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265799041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573849 + ... + 574311.

It is an arithmetic number, because the mean of its divisors is an integer number (3727080).

Almost surely, 2^265799040 is an apocalyptic number.

265799040 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 265799040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477066240).

265799040 is an abundant number, since it is smaller than the sum of its proper divisors (688333440).

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

265799040 is a wasteful number, since it uses less digits than its factorization.

265799040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 265799040 is about 16303.3444421689. The cubic root of 265799040 is about 642.9607610048.

The spelling of 265799040 in words is "two hundred sixty-five million, seven hundred ninety-nine thousand, forty".