265440000 has 360 divisors, whose sum is σ = 1021672960. Its totient is φ = 59904000.

The previous prime is 265439983. The next prime is 265440029. The reversal of 265440000 is 44562.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3359961 + ... + 3360039.

Almost surely, 2^265440000 is an apocalyptic number.

265440000 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 265440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510836480).

265440000 is an abundant number, since it is smaller than the sum of its proper divisors (756232960).

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

265440000 is an frugal number, since it uses more digits than its factorization.

265440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 265440000 is about 16292.3294835330. The cubic root of 265440000 is about 642.6711278383.

Adding to 265440000 its reverse (44562), we get a palindrome (265484562).

The spelling of 265440000 in words is "two hundred sixty-five million, four hundred forty thousand".