309028956409 has 12 divisors (see below), whose sum is σ = 331780253476. Its totient is φ = 287603898912.

The previous prime is 309028956407. The next prime is 309028956421. The reversal of 309028956409 is 904659820903.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 116044466409 + 192984490000 = 340653^2 + 439300^2 .

It is not a de Polignac number, because 309028956409 - 2¹ = 309028956407 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 309028956409.

It is not an unprimeable number, because it can be changed into a prime (309028956407) 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, 7874694 + ... + 7913839.

Almost surely, 2^309028956409 is an apocalyptic number.

It is an amenable number.

309028956409 is a deficient number, since it is larger than the sum of its proper divisors (22751297067).

309028956409 is a wasteful number, since it uses less digits than its factorization.

309028956409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15788616 (or 15788593 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 309028956409 in words is "three hundred nine billion, twenty-eight million, nine hundred fifty-six thousand, four hundred nine".