264538406 has 64 divisors (see below), whose sum is σ = 477792000. Its totient is φ = 108501120.

The previous prime is 264538397. The next prime is 264538409. The reversal of 264538406 is 604835462.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 264538406.

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 31 ways as a sum of consecutive naturals, for example, 1684880 + ... + 1685036.

It is an arithmetic number, because the mean of its divisors is an integer number (7465500).

Almost surely, 2^264538406 is an apocalyptic number.

264538406 is a deficient number, since it is larger than the sum of its proper divisors (213253594).

264538406 is a wasteful number, since it uses less digits than its factorization.

264538406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 264538406 is about 16264.6366697815. The cubic root of 264538406 is about 641.9426698029.

The spelling of 264538406 in words is "two hundred sixty-four million, five hundred thirty-eight thousand, four hundred six".