1384428365 has 4 divisors (see below), whose sum is σ = 1661314044. Its totient is φ = 1107542688.

The previous prime is 1384428343. The next prime is 1384428389. The reversal of 1384428365 is 5638244831.

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 744034729 + 640393636 = 27277^2 + 25306^2 .

It is a cyclic number.

It is not a de Polignac number, because 1384428365 - 2¹² = 1384424269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138442832 + ... + 138442841.

It is an arithmetic number, because the mean of its divisors is an integer number (415328511).

Almost surely, 2^1384428365 is an apocalyptic number.

It is an amenable number.

1384428365 is a deficient number, since it is larger than the sum of its proper divisors (276885679).

1384428365 is an equidigital number, since it uses as much as digits as its factorization.

1384428365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276885678.

The product of its digits is 552960, while the sum is 44.

The square root of 1384428365 is about 37207.9072913272. The cubic root of 1384428365 is about 1114.5258938725.

The spelling of 1384428365 in words is "one billion, three hundred eighty-four million, four hundred twenty-eight thousand, three hundred sixty-five".