264643489 has 8 divisors (see below), whose sum is σ = 290976768. Its totient is φ = 238689360.

The previous prime is 264643459. The next prime is 264643529. The reversal of 264643489 is 984346462.

264643489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264643489 - 2⁹ = 264642977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264643459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93322 + ... + 96115.

It is an arithmetic number, because the mean of its divisors is an integer number (36372096).

Almost surely, 2^264643489 is an apocalyptic number.

It is an amenable number.

264643489 is a deficient number, since it is larger than the sum of its proper divisors (26333279).

264643489 is a wasteful number, since it uses less digits than its factorization.

264643489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189575.

The product of its digits is 995328, while the sum is 46.

The square root of 264643489 is about 16267.8667624246. The cubic root of 264643489 is about 642.0276585102.

The spelling of 264643489 in words is "two hundred sixty-four million, six hundred forty-three thousand, four hundred eighty-nine".