194977938 has 16 divisors (see below), whose sum is σ = 400495680. Its totient is φ = 63236016.

The previous prime is 194977931. The next prime is 194977967. The reversal of 194977938 is 839779491.

It is not an unprimeable number, because it can be changed into a prime (194977931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438918 + ... + 439361.

It is an arithmetic number, because the mean of its divisors is an integer number (25030980).

Almost surely, 2^194977938 is an apocalyptic number.

194977938 is an abundant number, since it is smaller than the sum of its proper divisors (205517742).

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

194977938 is a wasteful number, since it uses less digits than its factorization.

194977938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878321.

The product of its digits is 3429216, while the sum is 57.

The square root of 194977938 is about 13963.4500751068. The cubic root of 194977938 is about 579.8671296903.

The spelling of 194977938 in words is "one hundred ninety-four million, nine hundred seventy-seven thousand, nine hundred thirty-eight".