309628770989 has 16 divisors (see below), whose sum is σ = 335522606400. Its totient is φ = 284651238144.

The previous prime is 309628770943. The next prime is 309628771009. The reversal of 309628770989 is 989077826903.

It is a cyclic number.

It is not a de Polignac number, because 309628770989 - 2³² = 305333803693 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 (309628730989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 825659 + ... + 1140600.

It is an arithmetic number, because the mean of its divisors is an integer number (20970162900).

Almost surely, 2^309628770989 is an apocalyptic number.

It is an amenable number.

309628770989 is a deficient number, since it is larger than the sum of its proper divisors (25893835411).

309628770989 is a wasteful number, since it uses less digits than its factorization.

309628770989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966492.

The product of its (nonzero) digits is 82301184, while the sum is 68.

The spelling of 309628770989 in words is "three hundred nine billion, six hundred twenty-eight million, seven hundred seventy thousand, nine hundred eighty-nine".