386740321 has 6 divisors (see below), whose sum is σ = 425094866. Its totient is φ = 351582000.

The previous prime is 386740309. The next prime is 386740351. The reversal of 386740321 is 123047683.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 381655296 + 5085025 = 19536^2 + 2255^2 .

It is not a de Polignac number, because 386740321 - 2²¹ = 384643169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (386740351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1597980 + ... + 1598221.

Almost surely, 2^386740321 is an apocalyptic number.

It is an amenable number.

386740321 is a deficient number, since it is larger than the sum of its proper divisors (38354545).

386740321 is a wasteful number, since it uses less digits than its factorization.

386740321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196223 (or 3196212 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 386740321 is about 19665.7143526494. The cubic root of 386740321 is about 728.5731313979.

The spelling of 386740321 in words is "three hundred eighty-six million, seven hundred forty thousand, three hundred twenty-one".