28897250 has 16 divisors (see below), whose sum is σ = 54096120. Its totient is φ = 11558800.

The previous prime is 28897249. The next prime is 28897283. The reversal of 28897250 is 5279882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14691889 + 14205361 = 3833^2 + 3769^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28897198 and 28897207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57545 + ... + 58044.

Almost surely, 2^28897250 is an apocalyptic number.

28897250 is a deficient number, since it is larger than the sum of its proper divisors (25198870).

28897250 is a wasteful number, since it uses less digits than its factorization.

28897250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115606 (or 115596 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 28897250 is about 5375.6162437436. The cubic root of 28897250 is about 306.8684019720.

The spelling of 28897250 in words is "twenty-eight million, eight hundred ninety-seven thousand, two hundred fifty".