28651250 has 20 divisors (see below), whose sum is σ = 53706246. Its totient is φ = 11460000.

The previous prime is 28651241. The next prime is 28651253. The reversal of 28651250 is 5215682.

It can be written as a sum of positive squares in 5 ways, for example, as 253009 + 28398241 = 503^2 + 5329^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28651253) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10211 + ... + 12710.

Almost surely, 2^28651250 is an apocalyptic number.

28651250 is a deficient number, since it is larger than the sum of its proper divisors (25054996).

28651250 is an equidigital number, since it uses as much as digits as its factorization.

28651250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22943 (or 22928 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 28651250 is about 5352.6862415053. The cubic root of 28651250 is about 305.9951371207.

The spelling of 28651250 in words is "twenty-eight million, six hundred fifty-one thousand, two hundred fifty".