384631 has 4 divisors (see below), whose sum is σ = 414232. Its totient is φ = 355032.

The previous prime is 384623. The next prime is 384641. The reversal of 384631 is 136483.

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 384631 - 2³ = 384623 is a prime.

It is a super-2 number, since 2×384631² = 295882012322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 384596 and 384605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384611) 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, 14781 + ... + 14806.

It is an arithmetic number, because the mean of its divisors is an integer number (103558).

2³⁸⁴⁶³¹ is an apocalyptic number.

384631 is a deficient number, since it is larger than the sum of its proper divisors (29601).

384631 is a wasteful number, since it uses less digits than its factorization.

384631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29600.

The product of its digits is 1728, while the sum is 25.

The square root of 384631 is about 620.1862623438. The cubic root of 384631 is about 72.7246145335.

The spelling of 384631 in words is "three hundred eighty-four thousand, six hundred thirty-one".