28893810 has 32 divisors (see below), whose sum is σ = 75650112. Its totient is φ = 7004480.

The previous prime is 28893797. The next prime is 28893811. The reversal of 28893810 is 1839882.

It is a super-2 number, since 2×28893810² = 1669704512632200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28893811) 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 15 ways as a sum of consecutive naturals, for example, 43449 + ... + 44108.

It is an arithmetic number, because the mean of its divisors is an integer number (2364066).

Almost surely, 2^28893810 is an apocalyptic number.

28893810 is an abundant number, since it is smaller than the sum of its proper divisors (46756302).

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

28893810 is a wasteful number, since it uses less digits than its factorization.

28893810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87578.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 28893810 is about 5375.2962709045. The cubic root of 28893810 is about 306.8562246979.

The spelling of 28893810 in words is "twenty-eight million, eight hundred ninety-three thousand, eight hundred ten".