266428 has 12 divisors (see below), whose sum is σ = 477400. Its totient is φ = 130032.

The previous prime is 266417. The next prime is 266447. The reversal of 266428 is 824662.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 266396 and 266405.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 603 + ... + 946.

2²⁶⁶⁴²⁸ is an apocalyptic number.

It is an amenable number.

266428 is a deficient number, since it is larger than the sum of its proper divisors (210972).

266428 is a wasteful number, since it uses less digits than its factorization.

266428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596 (or 1594 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 266428 is about 516.1666397589. The cubic root of 266428 is about 64.3467507310.

It can be divided in two parts, 2 and 66428, that added together give a triangular number (66430 = T₃₆₄).

The spelling of 266428 in words is "two hundred sixty-six thousand, four hundred twenty-eight".