385000019 has 4 divisors (see below), whose sum is σ = 387549840. Its totient is φ = 382450200.

The previous prime is 384999997. The next prime is 385000043. The reversal of 385000019 is 910000583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910000583 = 5347 ⋅170189.

It is a cyclic number.

It is not a de Polignac number, because 385000019 - 2¹⁶ = 384934483 is a prime.

It is a super-2 number, since 2×385000019² = 296450029260000722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385000079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274684 + ... + 1274985.

It is an arithmetic number, because the mean of its divisors is an integer number (96887460).

Almost surely, 2^385000019 is an apocalyptic number.

385000019 is a deficient number, since it is larger than the sum of its proper divisors (2549821).

385000019 is a wasteful number, since it uses less digits than its factorization.

385000019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549820.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 385000019 is about 19621.4173545134. The cubic root of 385000019 is about 727.4786468463.

The spelling of 385000019 in words is "three hundred eighty-five million, nineteen", and thus it is an aban number.