28250816 has 28 divisors (see below), whose sum is σ = 61158120. Its totient is φ = 12840960.

The previous prime is 28250813. The next prime is 28250837. The reversal of 28250816 is 61805282.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (28250813) 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 3 ways as a sum of consecutive naturals, for example, 19361 + ... + 20768.

Almost surely, 2^28250816 is an apocalyptic number.

It is an amenable number.

28250816 is an abundant number, since it is smaller than the sum of its proper divisors (32907304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28250816 is a wasteful number, since it uses less digits than its factorization.

28250816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40152 (or 40142 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 28250816 is about 5315.1496686359. The cubic root of 28250816 is about 304.5628998182.

The spelling of 28250816 in words is "twenty-eight million, two hundred fifty thousand, eight hundred sixteen".