9928776605 has 12 divisors (see below), whose sum is σ = 13096139196. Its totient is φ = 7220928000.

The previous prime is 9928776601. The next prime is 9928776607. The reversal of 9928776605 is 5066778299.

It can be written as a sum of positive squares in 2 ways, for example, as 1025344441 + 8903432164 = 32021^2 + 94358^2 .

It is not a de Polignac number, because 9928776605 - 2² = 9928776601 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 (9928776601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8204996 + ... + 8206205.

It is an arithmetic number, because the mean of its divisors is an integer number (1091344933).

Almost surely, 2^9928776605 is an apocalyptic number.

It is an amenable number.

9928776605 is a deficient number, since it is larger than the sum of its proper divisors (3167362591).

9928776605 is a wasteful number, since it uses less digits than its factorization.

9928776605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16411228 (or 16411217 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 59.

The square root of 9928776605 is about 99643.2466602730. The cubic root of 9928776605 is about 2149.3076267046.

The spelling of 9928776605 in words is "nine billion, nine hundred twenty-eight million, seven hundred seventy-six thousand, six hundred five".