1340165646 has 24 divisors (see below), whose sum is σ = 3056518920. Its totient is φ = 423210096.

The previous prime is 1340165599. The next prime is 1340165653. The reversal of 1340165646 is 6465610431.

It is a happy number.

1340165646 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 1 + 6 + 5 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1340165646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1958965 + ... + 1959648.

It is an arithmetic number, because the mean of its divisors is an integer number (127354955).

Almost surely, 2^1340165646 is an apocalyptic number.

1340165646 is an abundant number, since it is smaller than the sum of its proper divisors (1716353274).

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

1340165646 is a wasteful number, since it uses less digits than its factorization.

1340165646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918640 (or 3918637 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1340165646 is about 36608.2729174704. The cubic root of 1340165646 is about 1102.5191975308.

The spelling of 1340165646 in words is "one billion, three hundred forty million, one hundred sixty-five thousand, six hundred forty-six".