28876449007 has 4 divisors (see below), whose sum is σ = 33001656016. Its totient is φ = 24751242000.

The previous prime is 28876448981. The next prime is 28876449011. The reversal of 28876449007 is 70094467882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28876449007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28876449097) 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, 2062603494 + ... + 2062603507.

It is an arithmetic number, because the mean of its divisors is an integer number (8250414004).

Almost surely, 2^28876449007 is an apocalyptic number.

28876449007 is a deficient number, since it is larger than the sum of its proper divisors (4125207009).

28876449007 is an equidigital number, since it uses as much as digits as its factorization.

28876449007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125207008.

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 28876449007 in words is "twenty-eight billion, eight hundred seventy-six million, four hundred forty-nine thousand, seven".