28779505958 has 32 divisors (see below), whose sum is σ = 50432716800. Its totient is φ = 12060455904.

The previous prime is 28779505891. The next prime is 28779505961. The reversal of 28779505958 is 85950597782.

It is a junction number, because it is equal to n+sod(n) for n = 28779505894 and 28779505903.

It is a congruent 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, 710003 + ... + 749441.

It is an arithmetic number, because the mean of its divisors is an integer number (1576022400).

Almost surely, 2^28779505958 is an apocalyptic number.

28779505958 is a deficient number, since it is larger than the sum of its proper divisors (21653210842).

28779505958 is a wasteful number, since it uses less digits than its factorization.

28779505958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40604.

The product of its (nonzero) digits is 63504000, while the sum is 65.

The spelling of 28779505958 in words is "twenty-eight billion, seven hundred seventy-nine million, five hundred five thousand, nine hundred fifty-eight".