28792036509 has 4 divisors (see below), whose sum is σ = 38389382016. Its totient is φ = 19194691004.

The previous prime is 28792036489. The next prime is 28792036531. The reversal of 28792036509 is 90563029782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28792036509 - 2¹⁶ = 28791970973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28792036409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4798672749 + ... + 4798672754.

It is an arithmetic number, because the mean of its divisors is an integer number (9597345504).

Almost surely, 2^28792036509 is an apocalyptic number.

It is an amenable number.

28792036509 is a deficient number, since it is larger than the sum of its proper divisors (9597345507).

28792036509 is an equidigital number, since it uses as much as digits as its factorization.

28792036509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9597345506.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 28792036509 in words is "twenty-eight billion, seven hundred ninety-two million, thirty-six thousand, five hundred nine".