264738138 has 32 divisors (see below), whose sum is σ = 606883200. Its totient is φ = 75418560.

The previous prime is 264738137. The next prime is 264738151. The reversal of 264738138 is 831837462.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 264738138.

It is not an unprimeable number, because it can be changed into a prime (264738137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5628 + ... + 23688.

It is an arithmetic number, because the mean of its divisors is an integer number (18965100).

Almost surely, 2^264738138 is an apocalyptic number.

264738138 is an abundant number, since it is smaller than the sum of its proper divisors (342145062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

264738138 is a wasteful number, since it uses less digits than its factorization.

264738138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18422.

The product of its digits is 193536, while the sum is 42.

The square root of 264738138 is about 16270.7755807767. The cubic root of 264738138 is about 642.1041891831.

The spelling of 264738138 in words is "two hundred sixty-four million, seven hundred thirty-eight thousand, one hundred thirty-eight".