28203086 has 4 divisors (see below), whose sum is σ = 42304632. Its totient is φ = 14101542.

The previous prime is 28203073. The next prime is 28203101. The reversal of 28203086 is 68030282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68030282 = 2 ⋅34015141.

It is a congruent 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 as a sum of consecutive naturals, namely, 7050770 + ... + 7050773.

It is an arithmetic number, because the mean of its divisors is an integer number (10576158).

Almost surely, 2^28203086 is an apocalyptic number.

28203086 is a deficient number, since it is larger than the sum of its proper divisors (14101546).

28203086 is a wasteful number, since it uses less digits than its factorization.

28203086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14101545.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28203086 is about 5310.6577747017. The cubic root of 28203086 is about 304.3912825738.

The spelling of 28203086 in words is "twenty-eight million, two hundred three thousand, eighty-six".