9643399628 has 12 divisors (see below), whose sum is σ = 16878283800. Its totient is φ = 4821032832.

The previous prime is 9643399621. The next prime is 9643399637. The reversal of 9643399628 is 8269933469.

It is not an unprimeable number, because it can be changed into a prime (9643399621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133478 + ... + 192621.

It is an arithmetic number, because the mean of its divisors is an integer number (1406523650).

Almost surely, 2^9643399628 is an apocalyptic number.

It is an amenable number.

9643399628 is a deficient number, since it is larger than the sum of its proper divisors (7234884172).

9643399628 is a wasteful number, since it uses less digits than its factorization.

9643399628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333496 (or 333494 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 59.

The square root of 9643399628 is about 98200.8127664939. The cubic root of 9643399628 is about 2128.5150315918.

The spelling of 9643399628 in words is "nine billion, six hundred forty-three million, three hundred ninety-nine thousand, six hundred twenty-eight".