1340985646 has 72 divisors (see below), whose sum is σ = 2770097400. Its totient is φ = 482217120.

The previous prime is 1340985641. The next prime is 1340985677. The reversal of 1340985646 is 6465890431.

It is a junction number, because it is equal to n+sod(n) for n = 1340985596 and 1340985605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340985641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 149805 + ... + 158503.

It is an arithmetic number, because the mean of its divisors is an integer number (38473575).

Almost surely, 2^1340985646 is an apocalyptic number.

1340985646 is an abundant number, since it is smaller than the sum of its proper divisors (1429111754).

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

1340985646 is a wasteful number, since it uses less digits than its factorization.

1340985646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8750 (or 8732 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 1340985646 is about 36619.4708590935. The cubic root of 1340985646 is about 1102.7440158630.

The spelling of 1340985646 in words is "one billion, three hundred forty million, nine hundred eighty-five thousand, six hundred forty-six".