9428618221 has 8 divisors (see below), whose sum is σ = 10479837024. Its totient is φ = 8409744720.

The previous prime is 9428618207. The next prime is 9428618231. The reversal of 9428618221 is 1228168249.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9428618221 - 2⁷ = 9428618093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9428618231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8085711 + ... + 8086876.

It is an arithmetic number, because the mean of its divisors is an integer number (1309979628).

Almost surely, 2^9428618221 is an apocalyptic number.

It is an amenable number.

9428618221 is a deficient number, since it is larger than the sum of its proper divisors (1051218803).

9428618221 is a wasteful number, since it uses less digits than its factorization.

9428618221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16172651.

The product of its digits is 110592, while the sum is 43.

The square root of 9428618221 is about 97101.0721928445. The cubic root of 9428618221 is about 2112.5938780964.

The spelling of 9428618221 in words is "nine billion, four hundred twenty-eight million, six hundred eighteen thousand, two hundred twenty-one".