4242447394 has 4 divisors (see below), whose sum is σ = 6363671094. Its totient is φ = 2121223696.

The previous prime is 4242447383. The next prime is 4242447401. The reversal of 4242447394 is 4937442424.

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., 3002492025 + 1239955369 = 54795^2 + 35213^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4242447394.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060611847 + ... + 1060611850.

Almost surely, 2^4242447394 is an apocalyptic number.

4242447394 is a deficient number, since it is larger than the sum of its proper divisors (2121223700).

4242447394 is a wasteful number, since it uses less digits than its factorization.

4242447394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121223699.

The product of its digits is 774144, while the sum is 43.

The square root of 4242447394 is about 65134.0724505999. The cubic root of 4242447394 is about 1618.8458214442.

The spelling of 4242447394 in words is "four billion, two hundred forty-two million, four hundred forty-seven thousand, three hundred ninety-four".