28320486 has 16 divisors (see below), whose sum is σ = 56928000. Its totient is φ = 9392328.

The previous prime is 28320449. The next prime is 28320493. The reversal of 28320486 is 68402382.

It is a super-3 number, since 3×28320486³ (a number of 23 digits) contains 333 as substring.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 10666 + ... + 13053.

It is an arithmetic number, because the mean of its divisors is an integer number (3558000).

Almost surely, 2^28320486 is an apocalyptic number.

28320486 is an abundant number, since it is smaller than the sum of its proper divisors (28607514).

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

28320486 is a wasteful number, since it uses less digits than its factorization.

28320486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23923.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28320486 is about 5321.6995405603. The cubic root of 28320486 is about 304.8130575278.

The spelling of 28320486 in words is "twenty-eight million, three hundred twenty thousand, four hundred eighty-six".