28797779792 has 20 divisors (see below), whose sum is σ = 55799136960. Its totient is φ = 14398002528.

The previous prime is 28797779789. The next prime is 28797779797. The reversal of 28797779792 is 29797779782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28797779797) 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, 270233 + ... + 361415.

It is an arithmetic number, because the mean of its divisors is an integer number (2789956848).

Almost surely, 2^28797779792 is an apocalyptic number.

It is an amenable number.

28797779792 is a deficient number, since it is larger than the sum of its proper divisors (27001357168).

28797779792 is a wasteful number, since it uses less digits than its factorization.

28797779792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110930 (or 110924 counting only the distinct ones).

The product of its digits is 392073696, while the sum is 74.

The spelling of 28797779792 in words is "twenty-eight billion, seven hundred ninety-seven million, seven hundred seventy-nine thousand, seven hundred ninety-two".