386445779 has 4 divisors (see below), whose sum is σ = 388816776. Its totient is φ = 384074784.

The previous prime is 386445739. The next prime is 386445791. The reversal of 386445779 is 977544683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977544683 = 22157 ⋅44119.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-386445779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 386445779.

It is not an unprimeable number, because it can be changed into a prime (386445739) 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, 1185254 + ... + 1185579.

It is an arithmetic number, because the mean of its divisors is an integer number (97204194).

Almost surely, 2^386445779 is an apocalyptic number.

386445779 is a deficient number, since it is larger than the sum of its proper divisors (2370997).

386445779 is a wasteful number, since it uses less digits than its factorization.

386445779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370996.

The product of its digits is 5080320, while the sum is 53.

The square root of 386445779 is about 19658.2242076949. The cubic root of 386445779 is about 728.3881236313.

The spelling of 386445779 in words is "three hundred eighty-six million, four hundred forty-five thousand, seven hundred seventy-nine".