28002912 has 72 divisors (see below), whose sum is σ = 85523256. Its totient is φ = 7999488.

The previous prime is 28002907. The next prime is 28002971. The reversal of 28002912 is 21920082.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 11 ways as a sum of consecutive naturals, for example, 1728 + ... + 7680.

It is an arithmetic number, because the mean of its divisors is an integer number (1187823).

Almost surely, 2^28002912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28002912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42761628).

28002912 is an abundant number, since it is smaller than the sum of its proper divisors (57520344).

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

28002912 is a wasteful number, since it uses less digits than its factorization.

28002912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5980 (or 5965 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 28002912 is about 5291.7777731118. Note that the first 5 decimals coincide. The cubic root of 28002912 is about 303.6694236644.

Adding to 28002912 its reverse (21920082), we get a palindrome (49922994).

The spelling of 28002912 in words is "twenty-eight million, two thousand, nine hundred twelve".