1384420505 has 16 divisors (see below), whose sum is σ = 1800506064. Its totient is φ = 1015822080.

The previous prime is 1384420493. The next prime is 1384420511. The reversal of 1384420505 is 5050244831.

It can be written as a sum of positive squares in 8 ways, for example, as 403728649 + 980691856 = 20093^2 + 31316^2 .

It is not a de Polignac number, because 1384420505 - 2⁶ = 1384420441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57626 + ... + 78035.

It is an arithmetic number, because the mean of its divisors is an integer number (112531629).

Almost surely, 2^1384420505 is an apocalyptic number.

It is an amenable number.

1384420505 is a deficient number, since it is larger than the sum of its proper divisors (416085559).

1384420505 is a wasteful number, since it uses less digits than its factorization.

1384420505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135836.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 1384420505 is about 37207.8016684673. The cubic root of 1384420505 is about 1114.5237846529.

The spelling of 1384420505 in words is "one billion, three hundred eighty-four million, four hundred twenty thousand, five hundred five".