28776491038 has 4 divisors (see below), whose sum is σ = 43164736560. Its totient is φ = 14388245518.

The previous prime is 28776491027. The next prime is 28776491119. The reversal of 28776491038 is 83019467782.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28776491038.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7194122758 + ... + 7194122761.

It is an arithmetic number, because the mean of its divisors is an integer number (10791184140).

Almost surely, 2^28776491038 is an apocalyptic number.

28776491038 is a deficient number, since it is larger than the sum of its proper divisors (14388245522).

28776491038 is a wasteful number, since it uses less digits than its factorization.

28776491038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14388245521.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 28776491038 in words is "twenty-eight billion, seven hundred seventy-six million, four hundred ninety-one thousand, thirty-eight".