264428 has 6 divisors (see below), whose sum is σ = 462756. Its totient is φ = 132212.

The previous prime is 264403. The next prime is 264437. The reversal of 264428 is 824462.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁷ + 6² + 4³ + 4⁹ + 2¹¹ + 8 .

It is a junction number, because it is equal to n+sod(n) for n = 264397 and 264406.

It is an unprimeable number.

264428 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 33050 + ... + 33057.

It is an arithmetic number, because the mean of its divisors is an integer number (77126).

2²⁶⁴⁴²⁸ is an apocalyptic number.

It is an amenable number.

264428 is a deficient number, since it is larger than the sum of its proper divisors (198328).

264428 is a wasteful number, since it uses less digits than its factorization.

264428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66111 (or 66109 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

The square root of 264428 is about 514.2256314110. The cubic root of 264428 is about 64.1853351727.

The spelling of 264428 in words is "two hundred sixty-four thousand, four hundred twenty-eight".