264001138 has 8 divisors (see below), whose sum is σ = 396096732. Its totient is φ = 131968896.

The previous prime is 264001121. The next prime is 264001141. The reversal of 264001138 is 831100462.

It can be written as a sum of positive squares in 2 ways, for example, as 263185729 + 815409 = 16223^2 + 903^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3495 + ... + 23242.

Almost surely, 2^264001138 is an apocalyptic number.

264001138 is a deficient number, since it is larger than the sum of its proper divisors (132095594).

264001138 is a wasteful number, since it uses less digits than its factorization.

264001138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31676.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 264001138 is about 16248.1118287634. Note that the first 3 decimals coincide. The cubic root of 264001138 is about 641.5077877590.

The spelling of 264001138 in words is "two hundred sixty-four million, one thousand, one hundred thirty-eight".