386109891 has 12 divisors (see below), whose sum is σ = 561728440. Its totient is φ = 255553920.

The previous prime is 386109883. The next prime is 386109923. The reversal of 386109891 is 198901683.

It is not a de Polignac number, because 386109891 - 2³ = 386109883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (386109851) 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 11 ways as a sum of consecutive naturals, for example, 153070 + ... + 155571.

Almost surely, 2^386109891 is an apocalyptic number.

386109891 is a deficient number, since it is larger than the sum of its proper divisors (175618549).

386109891 is a wasteful number, since it uses less digits than its factorization.

386109891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308786 (or 308783 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 386109891 is about 19649.6791576860. The cubic root of 386109891 is about 728.1770308463.

The spelling of 386109891 in words is "three hundred eighty-six million, one hundred nine thousand, eight hundred ninety-one".