28273450 has 12 divisors (see below), whose sum is σ = 52588710. Its totient is φ = 11309360.

The previous prime is 28273447. The next prime is 28273451. The reversal of 28273450 is 5437282.

It can be written as a sum of positive squares in 3 ways, for example, as 13242321 + 15031129 = 3639^2 + 3877^2 .

It is not an unprimeable number, because it can be changed into a prime (28273451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282685 + ... + 282784.

Almost surely, 2^28273450 is an apocalyptic number.

28273450 is a deficient number, since it is larger than the sum of its proper divisors (24315260).

28273450 is a wasteful number, since it uses less digits than its factorization.

28273450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565481 (or 565476 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 28273450 is about 5317.2784392018. The cubic root of 28273450 is about 304.6442147145.

The spelling of 28273450 in words is "twenty-eight million, two hundred seventy-three thousand, four hundred fifty".