28766613091 has 8 divisors (see below), whose sum is σ = 29807483904. Its totient is φ = 27732799560.

The previous prime is 28766613079. The next prime is 28766613101. The reversal of 28766613091 is 19031666782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28766613091 - 2²⁵ = 28733058659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28766614091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1756021 + ... + 1772326.

It is an arithmetic number, because the mean of its divisors is an integer number (3725935488).

Almost surely, 2^28766613091 is an apocalyptic number.

28766613091 is a deficient number, since it is larger than the sum of its proper divisors (1040870813).

28766613091 is a wasteful number, since it uses less digits than its factorization.

28766613091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528641.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 28766613091 in words is "twenty-eight billion, seven hundred sixty-six million, six hundred thirteen thousand, ninety-one".