264378939 has 16 divisors (see below), whose sum is σ = 404791680. Its totient is φ = 151796160.

The previous prime is 264378929. The next prime is 264378967. The reversal of 264378939 is 939873462.

It is not a de Polignac number, because 264378939 - 2²⁷ = 130161211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 264378891 and 264378900.

It is not an unprimeable number, because it can be changed into a prime (264378929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210202 + ... + 211455.

It is an arithmetic number, because the mean of its divisors is an integer number (25299480).

Almost surely, 2^264378939 is an apocalyptic number.

264378939 is a deficient number, since it is larger than the sum of its proper divisors (140412741).

264378939 is a wasteful number, since it uses less digits than its factorization.

264378939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421690.

The product of its digits is 1959552, while the sum is 51.

The square root of 264378939 is about 16259.7336694055. The cubic root of 264378939 is about 641.8136535668.

The spelling of 264378939 in words is "two hundred sixty-four million, three hundred seventy-eight thousand, nine hundred thirty-nine".