1640323334 has 16 divisors (see below), whose sum is σ = 2651074272. Its totient is φ = 756694848.

The previous prime is 1640323327. The next prime is 1640323337. The reversal of 1640323334 is 4333230461.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1640323297 and 1640323306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640323337) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 41327 + ... + 70629.

It is an arithmetic number, because the mean of its divisors is an integer number (165692142).

Almost surely, 2^1640323334 is an apocalyptic number.

1640323334 is a deficient number, since it is larger than the sum of its proper divisors (1010750938).

1640323334 is a wasteful number, since it uses less digits than its factorization.

1640323334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31471.

The product of its (nonzero) digits is 15552, while the sum is 29.

The square root of 1640323334 is about 40500.9053479055. The cubic root of 1640323334 is about 1179.3512027562.

Adding to 1640323334 its reverse (4333230461), we get a palindrome (5973553795).

The spelling of 1640323334 in words is "one billion, six hundred forty million, three hundred twenty-three thousand, three hundred thirty-four".