384138725 has 18 divisors (see below), whose sum is σ = 480111570. Its totient is φ = 304887520.

The previous prime is 384138679. The next prime is 384138731. The reversal of 384138725 is 527831483.

It can be written as a sum of positive squares in 3 ways, for example, as 57121 + 384081604 = 239^2 + 19598^2 .

It is not a de Polignac number, because 384138725 - 2¹⁶ = 384073189 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 1427891 + ... + 1428159.

It is an arithmetic number, because the mean of its divisors is an integer number (26672865).

Almost surely, 2^384138725 is an apocalyptic number.

It is an amenable number.

384138725 is a deficient number, since it is larger than the sum of its proper divisors (95972845).

384138725 is an equidigital number, since it uses as much as digits as its factorization.

384138725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 513 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 384138725 is about 19599.4572628938. The cubic root of 384138725 is about 726.9357543914.

The spelling of 384138725 in words is "three hundred eighty-four million, one hundred thirty-eight thousand, seven hundred twenty-five".