28947250 has 32 divisors (see below), whose sum is σ = 54840240. Its totient is φ = 11440000.

The previous prime is 28947181. The next prime is 28947251. The reversal of 28947250 is 5274982.

It can be written as a sum of positive squares in 8 ways, for example, as 3575881 + 25371369 = 1891^2 + 5037^2 .

It is not an unprimeable number, because it can be changed into a prime (28947251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21600 + ... + 22900.

Almost surely, 2^28947250 is an apocalyptic number.

28947250 is a deficient number, since it is larger than the sum of its proper divisors (25892990).

28947250 is a wasteful number, since it uses less digits than its factorization.

28947250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407 (or 1397 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 28947250 is about 5380.2648633687. The cubic root of 28947250 is about 307.0452882291.

The spelling of 28947250 in words is "twenty-eight million, nine hundred forty-seven thousand, two hundred fifty".