4978394 has 4 divisors (see below), whose sum is σ = 7467594. Its totient is φ = 2489196.

The previous prime is 4978367. The next prime is 4978397. The reversal of 4978394 is 4938794.

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., 3948169 + 1030225 = 1987^2 + 1015^2 .

It is not an unprimeable number, because it can be changed into a prime (4978397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244597 + ... + 1244600.

Almost surely, 2^4978394 is an apocalyptic number.

4978394 is a deficient number, since it is larger than the sum of its proper divisors (2489200).

4978394 is a wasteful number, since it uses less digits than its factorization.

4978394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489199.

The product of its digits is 217728, while the sum is 44.

The square root of 4978394 is about 2231.2314985227. The cubic root of 4978394 is about 170.7509341005.

The spelling of 4978394 in words is "four million, nine hundred seventy-eight thousand, three hundred ninety-four".