385228273 has 4 divisors (see below), whose sum is σ = 387356788. Its totient is φ = 383099760.

The previous prime is 385228267. The next prime is 385228297. The reversal of 385228273 is 372822583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372822583 = 7 ⋅53260369.

It can be written as a sum of positive squares in 2 ways, for example, as 24532209 + 360696064 = 4953^2 + 18992^2 .

It is a cyclic number.

It is not a de Polignac number, because 385228273 - 2¹³ = 385220081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385228213) 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, 1063986 + ... + 1064347.

It is an arithmetic number, because the mean of its divisors is an integer number (96839197).

Almost surely, 2^385228273 is an apocalyptic number.

It is an amenable number.

385228273 is a deficient number, since it is larger than the sum of its proper divisors (2128515).

385228273 is a wasteful number, since it uses less digits than its factorization.

385228273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128514.

The product of its digits is 161280, while the sum is 40.

The square root of 385228273 is about 19627.2329430310. The cubic root of 385228273 is about 727.6223845939.

The spelling of 385228273 in words is "three hundred eighty-five million, two hundred twenty-eight thousand, two hundred seventy-three".