385336831 has 4 divisors (see below), whose sum is σ = 420367464. Its totient is φ = 350306200.

The previous prime is 385336829. The next prime is 385336849. The reversal of 385336831 is 138633583.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138633583 = 11 ⋅12603053.

It is a cyclic number.

It is not a de Polignac number, because 385336831 - 2¹ = 385336829 is a prime.

It is a super-2 number, since 2×385336831² = 296968946650245122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385336801) 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, 17515300 + ... + 17515321.

It is an arithmetic number, because the mean of its divisors is an integer number (105091866).

Almost surely, 2^385336831 is an apocalyptic number.

385336831 is a deficient number, since it is larger than the sum of its proper divisors (35030633).

385336831 is a wasteful number, since it uses less digits than its factorization.

385336831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35030632.

The product of its digits is 155520, while the sum is 40.

The square root of 385336831 is about 19629.9982424859. The cubic root of 385336831 is about 727.6907265942.

The spelling of 385336831 in words is "three hundred eighty-five million, three hundred thirty-six thousand, eight hundred thirty-one".