28351250 has 40 divisors (see below), whose sum is σ = 54666876. Its totient is φ = 11016000.

The previous prime is 28351247. The next prime is 28351259. The reversal of 28351250 is 5215382.

It can be written as a sum of positive squares in 10 ways, for example, as 4721929 + 23629321 = 2173^2 + 4861^2 .

It is not an unprimeable number, because it can be changed into a prime (28351259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 45944 + ... + 46556.

Almost surely, 2^28351250 is an apocalyptic number.

28351250 is a deficient number, since it is larger than the sum of its proper divisors (26315626).

28351250 is an equidigital number, since it uses as much as digits as its factorization.

28351250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 28351250 is about 5324.5891860312. The cubic root of 28351250 is about 304.9233884440.

The spelling of 28351250 in words is "twenty-eight million, three hundred fifty-one thousand, two hundred fifty".