28045602 has 96 divisors (see below), whose sum is σ = 71180928. Its totient is φ = 8211456.

The previous prime is 28045573. The next prime is 28045609. The reversal of 28045602 is 20654082.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28045609) 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 47 ways as a sum of consecutive naturals, for example, 145218 + ... + 145410.

It is an arithmetic number, because the mean of its divisors is an integer number (741468).

Almost surely, 2^28045602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28045602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35590464).

28045602 is an abundant number, since it is smaller than the sum of its proper divisors (43135326).

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

28045602 is a wasteful number, since it uses less digits than its factorization.

28045602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 28045602 is about 5295.8098530820. The cubic root of 28045602 is about 303.8236584055.

Adding to 28045602 its reverse (20654082), we get a palindrome (48699684).

The spelling of 28045602 in words is "twenty-eight million, forty-five thousand, six hundred two".