28776667794 has 32 divisors (see below), whose sum is σ = 66514296960. Its totient is φ = 8129523072.

The previous prime is 28776667783. The next prime is 28776667807. The reversal of 28776667794 is 49776667782.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3845469 + ... + 3852944.

It is an arithmetic number, because the mean of its divisors is an integer number (2078571780).

Almost surely, 2^28776667794 is an apocalyptic number.

28776667794 is an abundant number, since it is smaller than the sum of its proper divisors (37737629166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28776667794 is a wasteful number, since it uses less digits than its factorization.

28776667794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7698514.

The product of its digits is 298722816, while the sum is 69.

The spelling of 28776667794 in words is "twenty-eight billion, seven hundred seventy-six million, six hundred sixty-seven thousand, seven hundred ninety-four".