1340006644 has 12 divisors (see below), whose sum is σ = 2347873668. Its totient is φ = 669185600.

The previous prime is 1340006641. The next prime is 1340006659. The reversal of 1340006644 is 4466000431.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 243734544 + 1096272100 = 15612^2 + 33110^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340006641) 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 3 ways as a sum of consecutive naturals, for example, 200737 + ... + 207304.

It is an arithmetic number, because the mean of its divisors is an integer number (195656139).

Almost surely, 2^1340006644 is an apocalyptic number.

It is an amenable number.

1340006644 is a deficient number, since it is larger than the sum of its proper divisors (1007867024).

1340006644 is a wasteful number, since it uses less digits than its factorization.

1340006644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408866 (or 408864 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1340006644 is about 36606.1011854581. The cubic root of 1340006644 is about 1102.4755935452.

The spelling of 1340006644 in words is "one billion, three hundred forty million, six thousand, six hundred forty-four".