28056250 has 36 divisors (see below), whose sum is σ = 53398926. Its totient is φ = 11055000.

The previous prime is 28056221. The next prime is 28056257. The reversal of 28056250 is 5265082.

It can be written as a sum of positive squares in 3 ways, for example, as 40401 + 28015849 = 201^2 + 5293^2 .

It is not an unprimeable number, because it can be changed into a prime (28056257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 418717 + ... + 418783.

Almost surely, 2^28056250 is an apocalyptic number.

28056250 is a deficient number, since it is larger than the sum of its proper divisors (25342676).

28056250 is an frugal number, since it uses more digits than its factorization.

28056250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 28056250 is about 5296.8150807820. The cubic root of 28056250 is about 303.8621041836.

The spelling of 28056250 in words is "twenty-eight million, fifty-six thousand, two hundred fifty".