264538405 has 8 divisors (see below), whose sum is σ = 319394592. Its totient is φ = 210331728.

The previous prime is 264538397. The next prime is 264538409. The reversal of 264538405 is 504835462.

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 264538405 - 2³ = 264538397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264538409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161479 + ... + 163108.

It is an arithmetic number, because the mean of its divisors is an integer number (39924324).

Almost surely, 2^264538405 is an apocalyptic number.

It is an amenable number.

264538405 is a deficient number, since it is larger than the sum of its proper divisors (54856187).

264538405 is a wasteful number, since it uses less digits than its factorization.

264538405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324755.

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 264538405 is about 16264.6366390399. The cubic root of 264538405 is about 641.9426689940.

The spelling of 264538405 in words is "two hundred sixty-four million, five hundred thirty-eight thousand, four hundred five".