4778194 has 4 divisors (see below), whose sum is σ = 7167294. Its totient is φ = 2389096.

The previous prime is 4778183. The next prime is 4778197. The reversal of 4778194 is 4918774.

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

It can be written as a sum of positive squares in only one way, i.e., 4774225 + 3969 = 2185^2 + 63^2 .

It is a super-2 number, since 2×4778194² = 45662275803272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (4778197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1194547 + ... + 1194550.

Almost surely, 2^4778194 is an apocalyptic number.

4778194 is a deficient number, since it is larger than the sum of its proper divisors (2389100).

4778194 is a wasteful number, since it uses less digits than its factorization.

4778194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389099.

The product of its digits is 56448, while the sum is 40.

The square root of 4778194 is about 2185.9080493013. The cubic root of 4778194 is about 168.4307023083.

The spelling of 4778194 in words is "four million, seven hundred seventy-eight thousand, one hundred ninety-four".