28204250 has 32 divisors (see below), whose sum is σ = 53368848. Its totient is φ = 11160000.

The previous prime is 28204247. The next prime is 28204261. The reversal of 28204250 is 5240282.

It can be written as a sum of positive squares in 8 ways, for example, as 966289 + 27237961 = 983^2 + 5219^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24692 + ... + 25808.

Almost surely, 2^28204250 is an apocalyptic number.

28204250 is a deficient number, since it is larger than the sum of its proper divisors (25164598).

28204250 is a wasteful number, since it uses less digits than its factorization.

28204250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 28204250 is about 5310.7673645152. The cubic root of 28204250 is about 304.3954701366.

The spelling of 28204250 in words is "twenty-eight million, two hundred four thousand, two hundred fifty".