1640323308 has 24 divisors (see below), whose sum is σ = 4121838448. Its totient is φ = 504714816.

The previous prime is 1640323301. The next prime is 1640323309. The reversal of 1640323308 is 8033230461.

It is not an unprimeable number, because it can be changed into a prime (1640323301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5257291 + ... + 5257602.

Almost surely, 2^1640323308 is an apocalyptic number.

It is an amenable number.

1640323308 is an abundant number, since it is smaller than the sum of its proper divisors (2481515140).

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

1640323308 is a wasteful number, since it uses less digits than its factorization.

1640323308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10514913 (or 10514911 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1640323308 is about 40500.9050269250. The cubic root of 1640323308 is about 1179.3511965251.

Adding to 1640323308 its reverse (8033230461), we get a palindrome (9673553769).

The spelling of 1640323308 in words is "one billion, six hundred forty million, three hundred twenty-three thousand, three hundred eight".