28304077307 has 16 divisors (see below), whose sum is σ = 30978288000. Its totient is φ = 25646831040.

The previous prime is 28304077271. The next prime is 28304077327. The reversal of 28304077307 is 70377040382.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28304077307 is a prime.

It is a super-2 number, since 2×28304077307² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28304077327) 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, 8577944 + ... + 8581242.

It is an arithmetic number, because the mean of its divisors is an integer number (1936143000).

Almost surely, 2^28304077307 is an apocalyptic number.

28304077307 is a deficient number, since it is larger than the sum of its proper divisors (2674210693).

28304077307 is a wasteful number, since it uses less digits than its factorization.

28304077307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5626.

The product of its (nonzero) digits is 197568, while the sum is 41.

The spelling of 28304077307 in words is "twenty-eight billion, three hundred four million, seventy-seven thousand, three hundred seven".