1640335714 has 8 divisors (see below), whose sum is σ = 2461659228. Its totient is φ = 819782640.

The previous prime is 1640335687. The next prime is 1640335747. The reversal of 1640335714 is 4175330461.

It can be written as a sum of positive squares in 2 ways, for example, as 1629333225 + 11002489 = 40365^2 + 3317^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1640335714.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187257 + ... + 195820.

Almost surely, 2^1640335714 is an apocalyptic number.

1640335714 is a deficient number, since it is larger than the sum of its proper divisors (821323514).

1640335714 is a wasteful number, since it uses less digits than its factorization.

1640335714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385220.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 1640335714 is about 40501.0581837068. The cubic root of 1640335714 is about 1179.3541697182.

The spelling of 1640335714 in words is "one billion, six hundred forty million, three hundred thirty-five thousand, seven hundred fourteen".