996783638 has 4 divisors (see below), whose sum is σ = 1495175460. Its totient is φ = 498391818.

The previous prime is 996783581. The next prime is 996783649. The reversal of 996783638 is 836387699.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249195908 + ... + 249195911.

It is an arithmetic number, because the mean of its divisors is an integer number (373793865).

Almost surely, 2^996783638 is an apocalyptic number.

996783638 is a deficient number, since it is larger than the sum of its proper divisors (498391822).

996783638 is a wasteful number, since it uses less digits than its factorization.

996783638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498391821.

The product of its digits is 11757312, while the sum is 59.

The square root of 996783638 is about 31571.8804951495. The cubic root of 996783638 is about 998.9267278323.

The spelling of 996783638 in words is "nine hundred ninety-six million, seven hundred eighty-three thousand, six hundred thirty-eight".