994920638 has 4 divisors (see below), whose sum is σ = 1492380960. Its totient is φ = 497460318.

The previous prime is 994920629. The next prime is 994920643. The reversal of 994920638 is 836029499.

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, 248730158 + ... + 248730161.

It is an arithmetic number, because the mean of its divisors is an integer number (373095240).

Almost surely, 2^994920638 is an apocalyptic number.

994920638 is a deficient number, since it is larger than the sum of its proper divisors (497460322).

994920638 is a wasteful number, since it uses less digits than its factorization.

994920638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497460321.

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 994920638 is about 31542.3625938198. The cubic root of 994920638 is about 998.3040045589.

The spelling of 994920638 in words is "nine hundred ninety-four million, nine hundred twenty thousand, six hundred thirty-eight".