28999556 has 6 divisors (see below), whose sum is σ = 50749230. Its totient is φ = 14499776.

The previous prime is 28999549. The next prime is 28999577. The reversal of 28999556 is 65599982.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28987456 + 12100 = 5384^2 + 110^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28999498 and 28999507.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3624941 + ... + 3624948.

It is an arithmetic number, because the mean of its divisors is an integer number (8458205).

Almost surely, 2^28999556 is an apocalyptic number.

It is an amenable number.

28999556 is a deficient number, since it is larger than the sum of its proper divisors (21749674).

28999556 is a wasteful number, since it uses less digits than its factorization.

28999556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7249893 (or 7249891 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 53.

The square root of 28999556 is about 5385.1235826116. The cubic root of 28999556 is about 307.2301146196.

The spelling of 28999556 in words is "twenty-eight million, nine hundred ninety-nine thousand, five hundred fifty-six".