28779958 has 8 divisors (see below), whose sum is σ = 43761528. Its totient is φ = 14192784.

The previous prime is 28779941. The next prime is 28779973. The reversal of 28779958 is 85997782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28779899 and 28779908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98416 + ... + 98707.

It is an arithmetic number, because the mean of its divisors is an integer number (5470191).

Almost surely, 2^28779958 is an apocalyptic number.

28779958 is a deficient number, since it is larger than the sum of its proper divisors (14981570).

28779958 is a wasteful number, since it uses less digits than its factorization.

28779958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197198.

The product of its digits is 2540160, while the sum is 55.

The square root of 28779958 is about 5364.6955179208. The cubic root of 28779958 is about 306.4526528756.

The spelling of 28779958 in words is "twenty-eight million, seven hundred seventy-nine thousand, nine hundred fifty-eight".