1384253840 has 20 divisors (see below), whose sum is σ = 3218390364. Its totient is φ = 553701504.

The previous prime is 1384253837. The next prime is 1384253861. The reversal of 1384253840 is 483524831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 217621504 + 1166632336 = 14752^2 + 34156^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1384253794 and 1384253803.

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, 8651507 + ... + 8651666.

Almost surely, 2^1384253840 is an apocalyptic number.

1384253840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1384253840 is an abundant number, since it is smaller than the sum of its proper divisors (1834136524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1384253840 is a wasteful number, since it uses less digits than its factorization.

1384253840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17303186 (or 17303180 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 1384253840 is about 37205.5619497945. The cubic root of 1384253840 is about 1114.4790584635.

The spelling of 1384253840 in words is "one billion, three hundred eighty-four million, two hundred fifty-three thousand, eight hundred forty".