28861250 has 40 divisors (see below), whose sum is σ = 59043600. Its totient is φ = 10490000.

The previous prime is 28861249. The next prime is 28861267. The reversal of 28861250 is 5216882.

It is a Curzon number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 12701 + ... + 14799.

It is an arithmetic number, because the mean of its divisors is an integer number (1476090).

Almost surely, 2^28861250 is an apocalyptic number.

28861250 is an abundant number, since it is smaller than the sum of its proper divisors (30182350).

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

28861250 is a wasteful number, since it uses less digits than its factorization.

28861250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132 (or 2117 counting only the distinct ones).

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

The square root of 28861250 is about 5372.2667469142. The cubic root of 28861250 is about 306.7409174860.

It can be divided in two parts, 288 and 61250, that multiplied together give a square (17640000 = 4200²).

The spelling of 28861250 in words is "twenty-eight million, eight hundred sixty-one thousand, two hundred fifty".