47778194 has 8 divisors (see below), whose sum is σ = 75883068. Its totient is φ = 22483840.

The previous prime is 47778193. The next prime is 47778221. The reversal of 47778194 is 49187774.

It can be written as a sum of positive squares in 2 ways, for example, as 47541025 + 237169 = 6895^2 + 487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (47778193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702587 + ... + 702654.

Almost surely, 2^47778194 is an apocalyptic number.

47778194 is a deficient number, since it is larger than the sum of its proper divisors (28104874).

47778194 is a wasteful number, since it uses less digits than its factorization.

47778194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405260.

The product of its digits is 395136, while the sum is 47.

The square root of 47778194 is about 6912.1772257372. The cubic root of 47778194 is about 362.8634648554.

The spelling of 47778194 in words is "forty-seven million, seven hundred seventy-eight thousand, one hundred ninety-four".