994478 has 4 divisors (see below), whose sum is σ = 1491720. Its totient is φ = 497238.

The previous prime is 994471. The next prime is 994489. The reversal of 994478 is 874499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874499 = 431 ⋅2029.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 994478.

It is not an unprimeable number, because it can be changed into a prime (994471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248618 + ... + 248621.

It is an arithmetic number, because the mean of its divisors is an integer number (372930).

2⁹⁹⁴⁴⁷⁸ is an apocalyptic number.

994478 is a deficient number, since it is larger than the sum of its proper divisors (497242).

994478 is a wasteful number, since it uses less digits than its factorization.

994478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497241.

The product of its digits is 72576, while the sum is 41.

The square root of 994478 is about 997.2351778793. The cubic root of 994478 is about 99.8155934847.

The spelling of 994478 in words is "nine hundred ninety-four thousand, four hundred seventy-eight".