28707012291 has 8 divisors (see below), whose sum is σ = 39166156480. Its totient is φ = 18692938152.

The previous prime is 28707012283. The next prime is 28707012319. The reversal of 28707012291 is 19221070782.

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

It is not a de Polignac number, because 28707012291 - 2³ = 28707012283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28707012221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111267361 + ... + 111267618.

It is an arithmetic number, because the mean of its divisors is an integer number (4895769560).

Almost surely, 2^28707012291 is an apocalyptic number.

28707012291 is a deficient number, since it is larger than the sum of its proper divisors (10459144189).

28707012291 is a wasteful number, since it uses less digits than its factorization.

28707012291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222535025.

The product of its (nonzero) digits is 28224, while the sum is 39.

The spelling of 28707012291 in words is "twenty-eight billion, seven hundred seven million, twelve thousand, two hundred ninety-one".