385261831 has 8 divisors (see below), whose sum is σ = 399993984. Its totient is φ = 370673760.

The previous prime is 385261801. The next prime is 385261843. The reversal of 385261831 is 138162583.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 385261831 - 2⁷ = 385261703 is a prime.

It is a super-2 number, since 2×385261831² = 296853356850945122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385261801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30556 + ... + 41281.

It is an arithmetic number, because the mean of its divisors is an integer number (49999248).

Almost surely, 2^385261831 is an apocalyptic number.

385261831 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

385261831 is a deficient number, since it is larger than the sum of its proper divisors (14732153).

385261831 is a wasteful number, since it uses less digits than its factorization.

385261831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72041.

The product of its digits is 34560, while the sum is 37.

The square root of 385261831 is about 19628.0878080367. The cubic root of 385261831 is about 727.6435121908.

The spelling of 385261831 in words is "three hundred eighty-five million, two hundred sixty-one thousand, eight hundred thirty-one".