9665629428 has 48 divisors (see below), whose sum is σ = 27757708160. Its totient is φ = 2549176704.

The previous prime is 9665629417. The next prime is 9665629447. The reversal of 9665629428 is 8249265669.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4424563 + ... + 4426746.

Almost surely, 2^9665629428 is an apocalyptic number.

It is an amenable number.

9665629428 is an abundant number, since it is smaller than the sum of its proper divisors (18092078732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9665629428 is a wasteful number, since it uses less digits than its factorization.

9665629428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8851336 (or 8851334 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 57.

The square root of 9665629428 is about 98313.9330308782. The cubic root of 9665629428 is about 2130.1493152837.

The spelling of 9665629428 in words is "nine billion, six hundred sixty-five million, six hundred twenty-nine thousand, four hundred twenty-eight".