386972181 has 16 divisors (see below), whose sum is σ = 573595200. Its totient is φ = 257845104.

The previous prime is 386972161. The next prime is 386972213. The reversal of 386972181 is 181279683.

386972181 is a `hidden beast` number, since 386 + 97 + 2 + 181 = 666.

It is not a de Polignac number, because 386972181 - 2¹³ = 386963989 is a prime.

It is a super-2 number, since 2×386972181² = 299494937735793522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386972111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96835 + ... + 100751.

It is an arithmetic number, because the mean of its divisors is an integer number (35849700).

Almost surely, 2^386972181 is an apocalyptic number.

It is an amenable number.

386972181 is a deficient number, since it is larger than the sum of its proper divisors (186623019).

386972181 is a wasteful number, since it uses less digits than its factorization.

386972181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7585 (or 7579 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 386972181 is about 19671.6085005777. The cubic root of 386972181 is about 728.7187012714.

The spelling of 386972181 in words is "three hundred eighty-six million, nine hundred seventy-two thousand, one hundred eighty-one".