384222709 has 4 divisors (see below), whose sum is σ = 413778316. Its totient is φ = 354667104.

The previous prime is 384222577. The next prime is 384222737. The reversal of 384222709 is 907222483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 216001809 + 168220900 = 14697^2 + 12970^2 .

It is a cyclic number.

It is not a de Polignac number, because 384222709 - 2⁹ = 384222197 is a prime.

It is a super-2 number, since 2×384222709² = 295254180222597362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384222739) 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, 14777784 + ... + 14777809.

It is an arithmetic number, because the mean of its divisors is an integer number (103444579).

Almost surely, 2^384222709 is an apocalyptic number.

It is an amenable number.

384222709 is a deficient number, since it is larger than the sum of its proper divisors (29555607).

384222709 is a wasteful number, since it uses less digits than its factorization.

384222709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29555606.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 384222709 is about 19601.5996541099. The cubic root of 384222709 is about 726.9887270284.

The spelling of 384222709 in words is "three hundred eighty-four million, two hundred twenty-two thousand, seven hundred nine".