1339821540 has 96 divisors (see below), whose sum is σ = 4182178560. Its totient is φ = 356099328.

The previous prime is 1339821533. The next prime is 1339821667. The reversal of 1339821540 is 451289331.

1339821540 is a `hidden beast` number, since 1 + 3 + 3 + 98 + 21 + 540 = 666.

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 = 1339821495 and 1339821504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165057 + ... + 172983.

It is an arithmetic number, because the mean of its divisors is an integer number (43564360).

Almost surely, 2^1339821540 is an apocalyptic number.

1339821540 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 1339821540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2091089280).

1339821540 is an abundant number, since it is smaller than the sum of its proper divisors (2842357020).

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

1339821540 is a wasteful number, since it uses less digits than its factorization.

1339821540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8258 (or 8250 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1339821540 is about 36603.5727764381. The cubic root of 1339821540 is about 1102.4248271204.

The spelling of 1339821540 in words is "one billion, three hundred thirty-nine million, eight hundred twenty-one thousand, five hundred forty".