265428 has 36 divisors (see below), whose sum is σ = 686868. Its totient is φ = 86400.

The previous prime is 265427. The next prime is 265451. The reversal of 265428 is 824562.

265428 is a `hidden beast` number, since 2 + 654 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 213444 + 51984 = 462^2 + 228^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2578 + ... + 2678.

2²⁶⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343434).

265428 is an abundant number, since it is smaller than the sum of its proper divisors (421440).

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

265428 is a wasteful number, since it uses less digits than its factorization.

265428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 179 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 265428 is about 515.1970496810. The cubic root of 265428 is about 64.2661443076.

The spelling of 265428 in words is "two hundred sixty-five thousand, four hundred twenty-eight".