28023008 has 96 divisors (see below), whose sum is σ = 64012032. Its totient is φ = 11980800.

The previous prime is 28023007. The next prime is 28023011. The reversal of 28023008 is 80032082.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28023001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528710 + ... + 528762.

It is an arithmetic number, because the mean of its divisors is an integer number (666792).

Almost surely, 2^28023008 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 28023008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32006016).

28023008 is an abundant number, since it is smaller than the sum of its proper divisors (35989024).

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

28023008 is a wasteful number, since it uses less digits than its factorization.

28023008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 28023008 is about 5293.6762273490. The cubic root of 28023008 is about 303.7420480342.

The spelling of 28023008 in words is "twenty-eight million, twenty-three thousand, eight".