385431 has 4 divisors (see below), whose sum is σ = 513912. Its totient is φ = 256952.

The previous prime is 385417. The next prime is 385433. The reversal of 385431 is 134583.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 385431 - 2⁹ = 384919 is a prime.

It is a super-2 number, since 2×385431² = 297114111522, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64236 + ... + 64241.

It is an arithmetic number, because the mean of its divisors is an integer number (128478).

2³⁸⁵⁴³¹ is an apocalyptic number.

385431 is a deficient number, since it is larger than the sum of its proper divisors (128481).

385431 is a wasteful number, since it uses less digits than its factorization.

385431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128480.

The product of its digits is 1440, while the sum is 24.

The square root of 385431 is about 620.8308948498. The cubic root of 385431 is about 72.7749999695.

The spelling of 385431 in words is "three hundred eighty-five thousand, four hundred thirty-one".