1994638328 has 32 divisors (see below), whose sum is σ = 3973492800. Its totient is φ = 936899712.

The previous prime is 1994638277. The next prime is 1994638333. The reversal of 1994638328 is 8238364991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1994638328.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107600 + ... + 124767.

It is an arithmetic number, because the mean of its divisors is an integer number (124171650).

Almost surely, 2^1994638328 is an apocalyptic number.

It is an amenable number.

1994638328 is a deficient number, since it is larger than the sum of its proper divisors (1978854472).

1994638328 is a wasteful number, since it uses less digits than its factorization.

1994638328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232439 (or 232435 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 53.

The square root of 1994638328 is about 44661.3740048378. The cubic root of 1994638328 is about 1258.7941617241.

The spelling of 1994638328 in words is "one billion, nine hundred ninety-four million, six hundred thirty-eight thousand, three hundred twenty-eight".