385823139 has 16 divisors (see below), whose sum is σ = 583161600. Its totient is φ = 224932896.

The previous prime is 385823129. The next prime is 385823147. The reversal of 385823139 is 931328583.

It is not a de Polignac number, because 385823139 - 2⁸ = 385822883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 385823139.

It is not an unprimeable number, because it can be changed into a prime (385823129) 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, 259599 + ... + 261080.

It is an arithmetic number, because the mean of its divisors is an integer number (36447600).

Almost surely, 2^385823139 is an apocalyptic number.

385823139 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

385823139 is a deficient number, since it is larger than the sum of its proper divisors (197338461).

385823139 is a wasteful number, since it uses less digits than its factorization.

385823139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520714.

The product of its digits is 155520, while the sum is 42.

The square root of 385823139 is about 19642.3811947533. The cubic root of 385823139 is about 727.9967212699.

The spelling of 385823139 in words is "three hundred eighty-five million, eight hundred twenty-three thousand, one hundred thirty-nine".