28448690 has 16 divisors (see below), whose sum is σ = 51857280. Its totient is φ = 11235120.

The previous prime is 28448689. The next prime is 28448699. The reversal of 28448690 is 9684482.

It is a super-2 number, since 2×28448690² = 1618655925432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28448699) 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 7 ways as a sum of consecutive naturals, for example, 17216 + ... + 18795.

It is an arithmetic number, because the mean of its divisors is an integer number (3241080).

Almost surely, 2^28448690 is an apocalyptic number.

28448690 is a deficient number, since it is larger than the sum of its proper divisors (23408590).

28448690 is a wasteful number, since it uses less digits than its factorization.

28448690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36097.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 28448690 is about 5333.7313393158. The cubic root of 28448690 is about 305.2723179292.

The spelling of 28448690 in words is "twenty-eight million, four hundred forty-eight thousand, six hundred ninety".