1340726816 has 96 divisors (see below), whose sum is σ = 3148020288. Its totient is φ = 554019840.

The previous prime is 1340726789. The next prime is 1340726831. The reversal of 1340726816 is 6186270431.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1340726816.

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 15 ways as a sum of consecutive naturals, for example, 304406 + ... + 308778.

It is an arithmetic number, because the mean of its divisors is an integer number (32791878).

Almost surely, 2^1340726816 is an apocalyptic number.

1340726816 is a gapful number since it is divisible by the number (16) 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 1340726816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1574010144).

1340726816 is an abundant number, since it is smaller than the sum of its proper divisors (1807293472).

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

1340726816 is a wasteful number, since it uses less digits than its factorization.

1340726816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4474 (or 4466 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1340726816 is about 36615.9366396655. The cubic root of 1340726816 is about 1102.6730626801.

The spelling of 1340726816 in words is "one billion, three hundred forty million, seven hundred twenty-six thousand, eight hundred sixteen".