28998250 has 32 divisors (see below), whose sum is σ = 54656784. Its totient is φ = 11520000.

The previous prime is 28998227. The next prime is 28998257. The reversal of 28998250 is 5289982.

It can be written as a sum of positive squares in 8 ways, for example, as 1530169 + 27468081 = 1237^2 + 5241^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28998197 and 28998206.

It is not an unprimeable number, because it can be changed into a prime (28998257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47950 + ... + 48550.

Almost surely, 2^28998250 is an apocalyptic number.

28998250 is a deficient number, since it is larger than the sum of its proper divisors (25658534).

28998250 is a wasteful number, since it uses less digits than its factorization.

28998250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 28998250 is about 5385.0023212623. The cubic root of 28998250 is about 307.2255024966.

The spelling of 28998250 in words is "twenty-eight million, nine hundred ninety-eight thousand, two hundred fifty".