265993728 has 320 divisors, whose sum is σ = 956938752. Its totient is φ = 63406080.

The previous prime is 265993723. The next prime is 265993807. The reversal of 265993728 is 827399562.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265993723) 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, 1537450 + ... + 1537622.

Almost surely, 2^265993728 is an apocalyptic number.

265993728 is a gapful number since it is divisible by the number (28) 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 265993728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478469376).

265993728 is an abundant number, since it is smaller than the sum of its proper divisors (690945024).

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

265993728 is a wasteful number, since it uses less digits than its factorization.

265993728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 209 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The square root of 265993728 is about 16309.3141486698. The cubic root of 265993728 is about 643.1177043790.

The spelling of 265993728 in words is "two hundred sixty-five million, nine hundred ninety-three thousand, seven hundred twenty-eight".