388676641 has 4 divisors (see below), whose sum is σ = 389041300. Its totient is φ = 388311984.

The previous prime is 388676623. The next prime is 388676653. The reversal of 388676641 is 146676883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146676883 = 2689 ⋅54547.

It can be written as a sum of positive squares in 2 ways, for example, as 168896016 + 219780625 = 12996^2 + 14825^2 .

It is a cyclic number.

It is not a de Polignac number, because 388676641 - 2¹⁵ = 388643873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388676611) 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, 180726 + ... + 182863.

It is an arithmetic number, because the mean of its divisors is an integer number (97260325).

Almost surely, 2^388676641 is an apocalyptic number.

It is an amenable number.

388676641 is a deficient number, since it is larger than the sum of its proper divisors (364659).

388676641 is a wasteful number, since it uses less digits than its factorization.

388676641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364658.

The product of its digits is 1161216, while the sum is 49.

The square root of 388676641 is about 19714.8837429999. The cubic root of 388676641 is about 729.7870405263.

The spelling of 388676641 in words is "three hundred eighty-eight million, six hundred seventy-six thousand, six hundred forty-one".