28998650 has 12 divisors (see below), whose sum is σ = 53937582. Its totient is φ = 11599440.

The previous prime is 28998649. The next prime is 28998661. The reversal of 28998650 is 5689982.

It can be written as a sum of positive squares in 3 ways, for example, as 15389929 + 13608721 = 3923^2 + 3689^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28998595 and 28998604.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289937 + ... + 290036.

Almost surely, 2^28998650 is an apocalyptic number.

28998650 is a deficient number, since it is larger than the sum of its proper divisors (24938932).

28998650 is a wasteful number, since it uses less digits than its factorization.

28998650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579985 (or 579980 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 28998650 is about 5385.0394613225. The cubic root of 28998650 is about 307.2269151064.

The spelling of 28998650 in words is "twenty-eight million, nine hundred ninety-eight thousand, six hundred fifty".