264001378 has 8 divisors (see below), whose sum is σ = 405660780. Its totient is φ = 128781120.

The previous prime is 264001289. The next prime is 264001393. The reversal of 264001378 is 873100462.

It can be written as a sum of positive squares in 2 ways, for example, as 260402769 + 3598609 = 16137^2 + 1897^2 .

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, 1609683 + ... + 1609846.

Almost surely, 2^264001378 is an apocalyptic number.

264001378 is a deficient number, since it is larger than the sum of its proper divisors (141659402).

264001378 is a wasteful number, since it uses less digits than its factorization.

264001378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219572.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 264001378 is about 16248.1192142352. The cubic root of 264001378 is about 641.5079821544.

The spelling of 264001378 in words is "two hundred sixty-four million, one thousand, three hundred seventy-eight".