9779021420 has 24 divisors (see below), whose sum is σ = 23469651744. Its totient is φ = 3352807296.

The previous prime is 9779021407. The next prime is 9779021423. The reversal of 9779021420 is 241209779.

It is not an unprimeable number, because it can be changed into a prime (9779021423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34924937 + ... + 34925216.

It is an arithmetic number, because the mean of its divisors is an integer number (977902156).

Almost surely, 2^9779021420 is an apocalyptic number.

It is an amenable number.

9779021420 is an abundant number, since it is smaller than the sum of its proper divisors (13690630324).

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

9779021420 is a wasteful number, since it uses less digits than its factorization.

9779021420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69850169 (or 69850167 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 9779021420 is about 98888.9347702765. The cubic root of 9779021420 is about 2138.4468758157.

The spelling of 9779021420 in words is "nine billion, seven hundred seventy-nine million, twenty-one thousand, four hundred twenty".