28078286 has 8 divisors (see below), whose sum is σ = 42141000. Its totient is φ = 14031288.

The previous prime is 28078283. The next prime is 28078307. The reversal of 28078286 is 68287082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28078283) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2945 + ... + 8051.

It is an arithmetic number, because the mean of its divisors is an integer number (5267625).

Almost surely, 2^28078286 is an apocalyptic number.

28078286 is a deficient number, since it is larger than the sum of its proper divisors (14062714).

28078286 is a wasteful number, since it uses less digits than its factorization.

28078286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858.

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 28078286 is about 5298.8947904256. The cubic root of 28078286 is about 303.9416367068.

It can be divided in two parts, 28078 and 286, that multiplied together give a palindrome (8030308).

The spelling of 28078286 in words is "twenty-eight million, seventy-eight thousand, two hundred eighty-six".