28777250 has 32 divisors (see below), whose sum is σ = 54812160. Its totient is φ = 11310000.

The previous prime is 28777249. The next prime is 28777283. The reversal of 28777250 is 5277782.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13775 + ... + 15725.

It is an arithmetic number, because the mean of its divisors is an integer number (1712880).

Almost surely, 2^28777250 is an apocalyptic number.

28777250 is a deficient number, since it is larger than the sum of its proper divisors (26034910).

28777250 is a wasteful number, since it uses less digits than its factorization.

28777250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 2017 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 28777250 is about 5364.4431211450. The cubic root of 28777250 is about 306.4430408647.

The spelling of 28777250 in words is "twenty-eight million, seven hundred seventy-seven thousand, two hundred fifty".