9777938428 has 12 divisors (see below), whose sum is σ = 17158019872. Its totient is φ = 4875647040.

The previous prime is 9777938419. The next prime is 9777938449. The reversal of 9777938428 is 8248397779.

It is a super-2 number, since 2×9777938428² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9777938428.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3328893 + ... + 3331828.

Almost surely, 2^9777938428 is an apocalyptic number.

It is an amenable number.

9777938428 is a deficient number, since it is larger than the sum of its proper divisors (7380081444).

9777938428 is a wasteful number, since it uses less digits than its factorization.

9777938428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6661092 (or 6661090 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 64.

The square root of 9777938428 is about 98883.4588189552. The cubic root of 9777938428 is about 2138.3679310945.

The spelling of 9777938428 in words is "nine billion, seven hundred seventy-seven million, nine hundred thirty-eight thousand, four hundred twenty-eight".