28998856 has 16 divisors (see below), whose sum is σ = 55638000. Its totient is φ = 14162064.

The previous prime is 28998847. The next prime is 28998911. The reversal of 28998856 is 65889982.

It is a junction number, because it is equal to n+sod(n) for n = 28998797 and 28998806.

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, 41806 + ... + 42493.

It is an arithmetic number, because the mean of its divisors is an integer number (3477375).

Almost surely, 2^28998856 is an apocalyptic number.

It is an amenable number.

28998856 is a deficient number, since it is larger than the sum of its proper divisors (26639144).

28998856 is a wasteful number, since it uses less digits than its factorization.

28998856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84348 (or 84344 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 55.

The square root of 28998856 is about 5385.0585883535. The cubic root of 28998856 is about 307.2276425954.

The spelling of 28998856 in words is "twenty-eight million, nine hundred ninety-eight thousand, eight hundred fifty-six".