9811796628 has 12 divisors (see below), whose sum is σ = 22894192160. Its totient is φ = 3270598872.

The previous prime is 9811796627. The next prime is 9811796663. The reversal of 9811796628 is 8266971189.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9811796623) 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, 408824848 + ... + 408824871.

Almost surely, 2^9811796628 is an apocalyptic number.

It is an amenable number.

9811796628 is an abundant number, since it is smaller than the sum of its proper divisors (13082395532).

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

9811796628 is a wasteful number, since it uses less digits than its factorization.

9811796628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817649726 (or 817649724 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 57.

The square root of 9811796628 is about 99054.5134155935. The cubic root of 9811796628 is about 2140.8332729012.

The spelling of 9811796628 in words is "nine billion, eight hundred eleven million, seven hundred ninety-six thousand, six hundred twenty-eight".