28022000 has 40 divisors (see below), whose sum is σ = 67762032. Its totient is φ = 11208000.

The previous prime is 28021993. The next prime is 28022009. The reversal of 28022000 is 22082.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (14) 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 (28022009) 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, 5006 + ... + 9005.

Almost surely, 2^28022000 is an apocalyptic number.

28022000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28022000 is an abundant number, since it is smaller than the sum of its proper divisors (39740032).

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

28022000 is a wasteful number, since it uses less digits than its factorization.

28022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14034 (or 14018 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 28022000 is about 5293.5810185545. The cubic root of 28022000 is about 303.7384060786.

Adding to 28022000 its reverse (22082), we get a palindrome (28044082).

The spelling of 28022000 in words is "twenty-eight million, twenty-two thousand".