1639828396 has 12 divisors (see below), whose sum is σ = 2877274120. Its totient is φ = 817750080.

The previous prime is 1639828391. The next prime is 1639828397. The reversal of 1639828396 is 6938289361.

It is not an unprimeable number, because it can be changed into a prime (1639828391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539325 + ... + 542356.

Almost surely, 2^1639828396 is an apocalyptic number.

It is an amenable number.

1639828396 is a deficient number, since it is larger than the sum of its proper divisors (1237445724).

1639828396 is a wasteful number, since it uses less digits than its factorization.

1639828396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082064 (or 1082062 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The square root of 1639828396 is about 40494.7946778348. The cubic root of 1639828396 is about 1179.2325748347.

The spelling of 1639828396 in words is "one billion, six hundred thirty-nine million, eight hundred twenty-eight thousand, three hundred ninety-six".