386441681 has 4 divisors (see below), whose sum is σ = 392991600. Its totient is φ = 379891764.

The previous prime is 386441677. The next prime is 386441707. The reversal of 386441681 is 186144683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 386441681 - 2² = 386441677 is a prime.

It is a super-2 number, since 2×386441681² = 298674345628211522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (386441611) 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, 3274871 + ... + 3274988.

It is an arithmetic number, because the mean of its divisors is an integer number (98247900).

Almost surely, 2^386441681 is an apocalyptic number.

It is an amenable number.

386441681 is a deficient number, since it is larger than the sum of its proper divisors (6549919).

386441681 is an equidigital number, since it uses as much as digits as its factorization.

386441681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6549918.

The product of its digits is 110592, while the sum is 41.

The square root of 386441681 is about 19658.1199762337. The cubic root of 386441681 is about 728.3855489320.

The spelling of 386441681 in words is "three hundred eighty-six million, four hundred forty-one thousand, six hundred eighty-one".