1339361640 has 96 divisors (see below), whose sum is σ = 4359462120. Its totient is φ = 356626944.

The previous prime is 1339361629. The next prime is 1339361641. The reversal of 1339361640 is 461639331.

1339361640 is a `hidden beast` number, since 1 + 3 + 3 + 9 + 3 + 6 + 1 + 640 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 914094756 + 425266884 = 30234^2 + 20622^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1339361595 and 1339361604.

It is not an unprimeable number, because it can be changed into a prime (1339361641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275874 + ... + 280686.

Almost surely, 2^1339361640 is an apocalyptic number.

1339361640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1339361640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2179731060).

1339361640 is an abundant number, since it is smaller than the sum of its proper divisors (3020100480).

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

1339361640 is a wasteful number, since it uses less digits than its factorization.

1339361640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5603 (or 5596 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 1339361640 is about 36597.2900636099. The cubic root of 1339361640 is about 1102.2986751952.

The spelling of 1339361640 in words is "one billion, three hundred thirty-nine million, three hundred sixty-one thousand, six hundred forty".