994226578 has 4 divisors (see below), whose sum is σ = 1491339870. Its totient is φ = 497113288.

The previous prime is 994226573. The next prime is 994226581. The reversal of 994226578 is 875622499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 875622499 = 3041 ⋅287939.

It can be written as a sum of positive squares in only one way, i.e., 992439009 + 1787569 = 31503^2 + 1337^2 .

It is not an unprimeable number, because it can be changed into a prime (994226573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248556643 + ... + 248556646.

Almost surely, 2^994226578 is an apocalyptic number.

994226578 is a deficient number, since it is larger than the sum of its proper divisors (497113292).

994226578 is a wasteful number, since it uses less digits than its factorization.

994226578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497113291.

The product of its digits is 2177280, while the sum is 52.

The square root of 994226578 is about 31531.3586450061. The cubic root of 994226578 is about 998.0718104748.

The spelling of 994226578 in words is "nine hundred ninety-four million, two hundred twenty-six thousand, five hundred seventy-eight".