386947231 has 24 divisors (see below), whose sum is σ = 437929632. Its totient is φ = 341510400.

The previous prime is 386947229. The next prime is 386947241. The reversal of 386947231 is 132749683.

It is not a de Polignac number, because 386947231 - 2¹ = 386947229 is a prime.

It is a super-5 number, since 5×386947231⁵ (a number of 44 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386947201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 626835 + ... + 627451.

It is an arithmetic number, because the mean of its divisors is an integer number (18247068).

Almost surely, 2^386947231 is an apocalyptic number.

386947231 is a deficient number, since it is larger than the sum of its proper divisors (50982401).

386947231 is a wasteful number, since it uses less digits than its factorization.

386947231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783 (or 772 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 386947231 is about 19670.9743276738. The cubic root of 386947231 is about 728.7030395751.

The spelling of 386947231 in words is "three hundred eighty-six million, nine hundred forty-seven thousand, two hundred thirty-one".