264138389 has 8 divisors (see below), whose sum is σ = 269474688. Its totient is φ = 258847120.

The previous prime is 264138377. The next prime is 264138443. The reversal of 264138389 is 983831462.

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 264138389 - 2⁴ = 264138373 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 (264138349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 719 + ... + 22995.

It is an arithmetic number, because the mean of its divisors is an integer number (33684336).

Almost surely, 2^264138389 is an apocalyptic number.

It is an amenable number.

264138389 is a deficient number, since it is larger than the sum of its proper divisors (5336299).

264138389 is a wasteful number, since it uses less digits than its factorization.

264138389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22515.

The product of its digits is 248832, while the sum is 44.

The square root of 264138389 is about 16252.3348784105. The cubic root of 264138389 is about 641.6189392135.

The spelling of 264138389 in words is "two hundred sixty-four million, one hundred thirty-eight thousand, three hundred eighty-nine".