28876781407 has 16 divisors (see below), whose sum is σ = 30745008000. Its totient is φ = 27078114784.

The previous prime is 28876781363. The next prime is 28876781411. The reversal of 28876781407 is 70418767882.

It is a de Polignac number, because none of the positive numbers 2^k-28876781407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28876781807) 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, 40344 + ... + 243682.

It is an arithmetic number, because the mean of its divisors is an integer number (1921563000).

Almost surely, 2^28876781407 is an apocalyptic number.

28876781407 is a deficient number, since it is larger than the sum of its proper divisors (1868226593).

28876781407 is a wasteful number, since it uses less digits than its factorization.

28876781407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203510.

The product of its (nonzero) digits is 8429568, while the sum is 58.

The spelling of 28876781407 in words is "twenty-eight billion, eight hundred seventy-six million, seven hundred eighty-one thousand, four hundred seven".